Maximize the Electrocatalytic Activity of Pt Toward Ethanol Oxidation via Engineering PdPt <sub>1</sub> Single‐Atom Alloy Skin
Abstract
ABSTRACT Single‐atom alloys (SAAs) emerge as an intriguing model system for electrocatalysis by combining the advantages of single‐atom catalysts and nanoalloys, yet it faces the challenge in engineering their surface structure at the atomic level. Herein, to fully utilize active Pt sites to boost ethanol oxidation electrocatalysis, single‐Pt‐atoms anchored onto the surface of intermetallic Pd 5 Bi 3 core‐ultrathin Pd shell octahedrons, namely a tensile‐strained PdPt 1 SAA skin, were rationally designed and engineered. This unique PdPt 1 SAA skin achieves a record‐high mass activity (553.58 A mg Pt −1 or 34.73 A mg Pt+Pd −1 ) and outstanding durability toward ethanol oxidation in alkaline electrolyte, outperforming the current high‐performance electrocatalysts. Density functional theory (DFT) calculations reveal that the isolated‐Pt‐atoms effectively enhance the adsorption of ethanol, accelerate the C2 pathway, and enhance the C‐C bond cleavage of the *CH 2 CO intermediate. The wet‐chemical fabrication of SAA skin opens up a general strategy to construct model surface that completely exposes and stabilizes active atoms, facilitating the development of highly efficient electrocatalysts.
Article Details
Authors (12)
Wen Chen
Department of Immunology, St. Jude Children’s Research Hospital
Lei Xie
Yong Li
Shuiping Luo
Shenzhen Key Laboratory of Energy Electrocatalytic Materials, College of Materials Science and Engineering, Shenzhen University 2 , Shenzhen, Guangdong 518055,
Xinyi Cai
Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering
Tangting Li
Shenzhen Key Laboratory of Energy Electrocatalytic Materials Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering Shenzhen University Shenzhen Guangdong P. R. China
Junhao Qiu
Zhichao Yang
Zhihan Yuan
Shenzhen Key Laboratory of Energy Electrocatalytic Materials Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering Shenzhen University Shenzhen Guangdong P. R. China
Shao‐Qing Liu
Shenzhen Key Laboratory of Energy Electrocatalytic Materials, Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering Shenzhen University Shenzhen 518060 China
Xian‐Zhu Fu
Shenzhen Key Laboratory of Energy Electrocatalytic Materials Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering, Shenzhen University Shenzhen Guangdong China
Jing‐Li Luo
Shenzhen Key Laboratory of Energy Electrocatalytic Materials Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering, Shenzhen University Shenzhen Guangdong China