Alessandro Giuseppe Antonio Anastasio Volta (UK: , US: ; Italian: [alesˈsandro dʒuˈzɛppe anˈtɔnjo anasˈtaːzjo ˈvɔlta]; 18 February 1745 – 5 March 1827), an Italian chemist and physicist, is recognized as a pioneer in the fields of electricity and power, credited with inventing the electric battery and discovering methane. In 1799, he developed the voltaic pile, subsequently publishing the findings of his experiments in a two-part letter addressed to the president of the Royal Society in 1800. This invention conclusively demonstrated the chemical generation of electricity, thereby refuting the prevailing theory that electricity originated exclusively from biological organisms. Volta's innovation stimulated considerable scientific enthusiasm, prompting further experimentation that ultimately contributed to the emergence of electrochemistry as a distinct field.
Alessandro Giuseppe Antonio Anastasio Volta (UK: , US: ; Italian: [alesˈsandrodʒuˈzɛppeanˈtɔnjoanasˈtaːzjoˈvɔlta]; 18 February 1745 – 5 March 1827) was an Italian chemist and physicist who was a pioneer of electricity and power, and is credited as the inventor of the electric battery and the discoverer of methane. He invented the voltaic pile in 1799, and reported the results of his experiments in a two-part letter to the president of the Royal Society, which was published in 1800. With this invention, Volta proved that electricity could be generated chemically and debunked the prevalent theory that electricity was generated solely by living beings. Volta's invention sparked a great amount of scientific excitement and led others to conduct similar experiments, which eventually led to the development of the field of electrochemistry.
Volta's invention garnered the admiration of Napoleon Bonaparte, leading to an invitation to the Institute of France to present his discovery to its members. Throughout his life, Volta maintained a degree of proximity to the emperor, who bestowed upon him numerous accolades. For almost four decades, Volta occupied the chair of experimental physics at the University of Pavia, where he was highly esteemed by his students. Notwithstanding his professional achievements, Volta exhibited a preference for domesticity, a tendency that became more pronounced in his later years as he increasingly withdrew from public life to prioritize his family. He passed away in 1827, following a series of illnesses that commenced in 1823. In recognition of his contributions, the SI unit of electric potential is designated as the volt.
Early Life and Matrimony
Alessandro Volta was born on February 18, 1745, in Como, a town situated in northern Italy. His father, Filippo Volta, belonged to a noble lineage. His mother, Donna Maddalena, was a member of the Inzaghi family. In 1794, Volta married Teresa Peregrini, an aristocratic woman also from Como, and together they raised three sons: Zanino, Flaminio, and Luigi.
Professional Career
In 1774, he assumed a professorship in physics at the Royal School in Como. The following year, he enhanced and widely disseminated the electrophorus, an apparatus designed to generate static electricity. His extensive promotion of this device frequently leads to his erroneous attribution as its inventor, despite a similar apparatus operating on the same principle having been documented in 1762 by the Swedish experimenter Johan Wilcke. In 1777, he undertook a journey through Switzerland, during which he established a friendship with the physicist and mountaineer H. B. de Saussure.
Between 1776 and 1778, Volta dedicated his research to the chemistry of gases. His research led to the discovery of methane, prompted by his review of a paper by Benjamin Franklin of the United States concerning "flammable air." In November 1776, he identified methane within the marshes of Angera on Lake Maggiore, successfully isolating it by 1778. He conceived and conducted experiments, including the ignition of methane by an electric spark within a sealed container.
Volta also investigated what is now termed electrical capacitance, devising distinct methodologies to examine both electrical potential difference (V) and charge (Q), and ascertaining their proportionality for a specific object. This principle is known as Volta's Law of Capacitance, and in recognition of this work, the unit of electrical potential was named the volt.
In 1779, he was appointed professor of experimental physics at the University of Pavia, a position he held for nearly four decades. Volta's lectures attracted such a large number of students that Emperor Joseph II subsequently commissioned the construction of a new "physical theatre," known today as the "Aula Volta," based on a design by Leopold Pollack. Additionally, the emperor provided Volta with significant financial resources to furnish the physics laboratory with instruments, which Volta procured from England and France. The University History Museum at the University of Pavia currently houses 150 of these instruments, which were utilized by Alessandro Volta.
Volta and Galvani
Luigi Galvani, an Italian physicist, identified a phenomenon he termed "animal electricity" upon connecting two dissimilar metals in series with a frog's leg. Volta recognized that the frog's leg functioned as both an electrical conductor (now known as an electrolyte) and a current detector. Crucially, he deduced that the frog's leg was not essential for the electric current, which originated from the interaction of the two distinct metals. Consequently, he substituted the biological component with brine-soaked paper and employed alternative methods, derived from his prior research, to detect electrical flow. This experimental approach led to his discovery of the electrochemical series and the formulation of a law stating that the electromotive force (emf) of a galvanic cell, comprising two metal electrodes separated by an electrolyte, equals the potential difference between these electrodes (implying that identical electrodes within a common electrolyte yield zero net emf). This principle is often referred to as Volta's Law of the Electrochemical Series.
In 1800, stemming from a scientific dispute regarding Galvani's proposed galvanic response, Volta devised the voltaic pile, an early form of electric battery capable of generating a continuous electric current. Volta had previously established that zinc and copper constituted the most efficient combination of dissimilar metals for electricity generation. His initial experiments involved connecting individual cells in series, each consisting of a wine goblet filled with brine containing two distinct electrodes. The subsequent voltaic pile design substituted these goblets with brine-soaked cardboard.
Early Battery Design
Upon presenting his invention of the voltaic pile, Volta acknowledged the significant contributions of William Nicholson, Tiberius Cavallo, and Abraham Bennet.
Volta's battery is recognized as one of the earliest electrochemical cells. Its construction involves two distinct electrodes: one composed of zinc and the other of copper. The electrolyte employed is typically either an aqueous solution of sulfuric acid or a saline brine. The electrolyte is present in the form of 2 H+ and SO2−§89§ ions. Zinc metal, positioned higher than both copper and hydrogen in the electrochemical series, undergoes oxidation to form zinc cations (Zn2+), releasing electrons that migrate towards the copper electrode. Positively charged hydrogen ions (protons) then acquire electrons from the copper electrode, resulting in the formation of hydrogen gas (H§1415§) bubbles. Consequently, the zinc rod functions as the negative electrode, while the copper rod serves as the positive electrode. Therefore, the cell possesses two terminals, and an electrical current will be generated upon their connection. The pertinent chemical reactions within this voltaic cell are:
- At the Zinc Electrode:
- Zn → Zn2+ + 2e−
- At the Copper Electrode (Hydrogen Reduction):
- 2H+ + 2e− → H§78§
Copper metal itself does not participate in a chemical reaction; instead, it acts as a catalyst for hydrogen gas formation and serves as an electrode for electron transfer. Similarly, the sulfate anion (SO2−4) remains chemically inert, migrating towards the zinc anode to neutralize the charge of the newly formed zinc cations. Nevertheless, this particular cell design presents several drawbacks. Its handling poses safety risks, as sulfuric acid, even in diluted forms, is corrosive and hazardous. Furthermore, the cell's power output decreases over time due to the accumulation of hydrogen gas. This gas is not released but instead collects on the copper electrode's surface, creating an insulating barrier between the metal and the electrolyte solution.
Later Life and Retirement
In 1809, Volta was inducted as an associate member of the Royal Institute of the Netherlands. Commemorating his scientific achievements, Napoleon Bonaparte conferred upon Volta the title of count in 1810.
Volta retired in 1819 to his property in Camnago, a frazione within Como, Italy, which has since been renamed "Camnago Volta" in his honor. He passed away there on March 5, 1827, shortly after his 82nd birthday. His remains are interred in Camnago Volta.
Legacy
Volta's enduring legacy is commemorated by the Tempio Voltiano memorial, situated in the lakeside public gardens. Additionally, a museum dedicated to his honor displays some of the experimental apparatus utilized by Volta. Adjacent to this, Villa Olmo hosts the Voltian Foundation, an entity dedicated to advancing scientific endeavors. It was in the vicinity of Como that Volta conducted his pioneering experimental studies and developed his initial inventions.
The University of Pavia's Old Campus features the Aula Volta, a classroom commissioned by Emperor Joseph II to Leopoldo Pollack in 1787 specifically for Alessandro Volta's lectures. Additionally, the University History Museum houses numerous scientific instruments formerly owned by Volta.
To commemorate the centenary of Volta's death, the Como Conference, an international physics gathering, was convened at Lake Como in 1927.
Volta's likeness, accompanied by a depiction of his voltaic pile, appeared on the Italian 10,000 Lire banknote issued between 1990 and 1997.
In late 2017, Nvidia introduced Volta, a new GPU microarchitecture designed for workstation applications.
The electric eel species Electrophorus voltai, identified in 2019 as the most potent natural producer of bioelectricity, received its name in honor of Volta.
Religious Beliefs
Volta, raised in the Catholic faith, maintained his religious convictions throughout his life. Despite his family's expectation that he would become a clergyman, his failure to be ordained led to occasional accusations of irreligiosity and speculation regarding his potential unbelief, with some emphasizing that he "did not join the Church" or "ignored the church's call." However, he dispelled such doubts through a formal declaration of faith, stating:
I cannot comprehend how anyone could question the sincerity and steadfastness of my adherence to the Roman, Catholic, and Apostolic religion—the faith in which I was born, raised, and have consistently professed, both outwardly and inwardly. While I have, regrettably and frequently, fallen short in performing the virtuous deeds characteristic of a Catholic Christian, and have committed numerous sins, I have, by God's particular grace, never, to my knowledge, faltered in my faith. I acknowledge this faith as a pure divine gift, a supernatural grace; yet, I have also diligently employed human means to affirm belief and overcome occasional doubts. I meticulously examined the foundations of religion, the arguments of both its proponents and detractors, and the reasons for and against it. I can affirm that the outcome of this study is to imbue religion with such a degree of probability, even for purely natural reason, that any spirit uncorrupted by sin and passion, any inherently noble spirit, must embrace and accept it. May this confession, requested of me and willingly provided, written and signed by my own hand, with authorization for you to present it to whomever you choose—for I am not ashamed of the Gospel—yield beneficial results!
Publications
- De vi attractiva ignis electrici, ac phaenomenis inde pendentibus [The attractive force of an electric fire and the resulting phenomena] (in Latin). Novo Comi: Typis Octavii Staurenghi. 1769. OCLC 1419897.Lesser-Known Collections
- Letters about animal electricity (1900) (Letters about animal electricity, Leipzig: W. Engelmann, publisher; accessible via WorldCat libraries).
- Investigations into galvanism, 1796–1800 (Studies on Galvanism, accessible via WorldCat libraries).
- Del modo di render sensibilissima la più debole elettricità sia naturale, sia artificiale (Of the method of rendering very sensible the weakest natural or artificial electricity by Alessandro Volta, Professor of Experimental Philosophy in Como, etc. Presented at the Royal Society, 14 March 1782; held in WorldCat libraries).
Armstrong effect
- Armstrong effect
- Electrophorus
- History of the battery
- History of the internal combustion engine
- Lemon battery
- Mercury beating heart
- Thermoelectric effect
- Volta (lunar crater)
- Volta Prize
References
Herbermann, Charles, ed. (1913). "Alessandro Volta" . In Catholic Encyclopedia. New York: Robert Appleton Company.
- Herbermann, Charles, ed. (1913). "Alessandro Volta" . Catholic Encyclopedia. New York: Robert Appleton Company.
- Chisholm, Hugh, ed. (1911). "Volta, Alessandro" . Encyclopædia Britannica. Vol. 28 (11th ed.). Cambridge University Press. p. 198.Source: TORIma Academy Archive