Researchers at Tulane University have determined that the durability of gold is attributed to a dynamic atomic restructuring process that inhibits oxidation.

杜蘭大學的研究人員確定，黃金的耐用性歸功於一種能抑制氧化的動態原子重組過程。

The prevailing scientific consensus previously attributed the non-reactive nature of gold to its status as a noble metal with a stable electron configuration. However, research conducted by Matthew Montemore and Santu Biswas, published in Physical Review Letters, indicates that this stability is augmented by a physical mechanism. Through the utilization of advanced computer simulations, the researchers observed that atoms on common gold surfaces spontaneously reorganize into geometric patterns. This structural reconfiguration serves as a kinetic barrier, reducing the rate of oxygen bonding by a factor of one billion to one trillion.

先前科學界的普遍共識將黃金的非反應特性歸因於其作為具有穩定電子組態的貴金屬。然而，由 Matthew Montemore 與 Santu Biswas 進行並發表於《物理評論快報》的研究指出，這種穩定性是由一種物理機制所增強的。透過使用先進的電腦模擬，研究人員觀察到常見黃金表面的原子會自發地重新排列成幾何圖案。這種結構重組充當了動力屏障，將氧氣結合的速率降低了十億至一兆倍。

This discovery possesses significant implications for the field of industrial catalysis. While the aforementioned atomic shield ensures the aesthetic longevity of the metal, it simultaneously diminishes the efficacy of gold-based catalysts in processes such as the production of vinyl acetate or the mitigation of carbon monoxide in exhaust systems. The researchers posit that if these surface rearrangements could be inhibited or reversed, the metal's capacity to dissociate oxygen would be enhanced, thereby optimizing its performance in green energy and manufacturing applications. This represents a departure from traditional methodologies, which typically rely on the integration of gold with other metals or the application of nanoparticles on oxide surfaces.

這項發現對工業催化領域具有重大影響。雖然上述的原子屏蔽確保了金屬的美學長久度，但同時降低了金基催化劑在生產乙酸乙烯酯或廢氣系統中減少一氧化碳等過程中的功效。研究人員認為，如果能抑制或反轉這些表面重組，金屬分解氧的能力將會提高，從而優化其在綠色能源與製造應用中的表現。這代表了對傳統方法的突破，傳統方法通常依賴於將黃金與其他金屬結合，或在氧化物表面應用奈米粒子。

Furthermore, the distinction between pure 24-karat gold and commercial alloys explains the variance in tarnish susceptibility. Pure gold remains impervious to most environmental pollutants; however, the addition of copper, silver, zinc, or nickel to increase hardness introduces elements prone to oxidation. The rate of this degradation is further accelerated by individual dermal acidity and exposure to chemical agents such as chlorine or ammonia-based cleaners. In the case of white gold, the observed discoloration is attributed to the mechanical attrition of the rhodium coating rather than a chemical reaction.

此外，純 24K 金與商業合金之間的區別，解釋了失去光澤程度的差異。純金對大多數環境污染物免疫；然而，為了增加硬度而加入的銅、銀、鋅或鎳，則引入了易於氧化的元素。這種退化速率會因個人皮膚酸鹼度以及接觸氯或氨基清潔劑等化學藥劑而進一步加速。在白金的情況下，觀察到的變色是由於銠塗層的機械磨損，而非化學反應。

The study clarifies the atomic basis for gold's resistance to tarnish and proposes a new methodology for enhancing industrial catalytic efficiency.

該研究闡明了黃金抗氧化的原子基礎，並提出了一種提高工業催化效率的新方法。