Surface Oxidation of AuNi Heterodimers to Achieve High Activities toward Hydrogen/Oxygen Evolution and Oxygen Reduction Reactions

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Bing NiXun Wang

Abstract

Although much attention has been paid to the exploration of highly active electrocatalysts, especially catalysts for hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), the development of multifunctional catalysts remains a challenge. Here, we utilize AuNi heterodimers as the starting materials to achieve high activities toward HER, OER and ORR. The HER and ORR activities in an alkali environment are similar to those of Pt catalysts, and the OER activity is very high and better than that of commercial IrO2 . Both the experimental and calculated results suggest that the surface oxidation under oxidative conditions is the main reason for the different activities. The NiO/Ni interface which exists in the as-synthesized heterodimers contributes to high HER activity, the Ni(OH)2 -Ni-Au interface and the surface Ni(OH)2 obtained in electrochemical conditons gives rise to promising ORR and OER activities, respectively. As a comparison, a Au@Ni core-shell structure is also synthesized and examined. The core-shell structure shows lower activities for HER and OER than the heterodimers, and reduces O2 selectively to H2 O2 . The work here allows for the development of a method to design m...Continue Reading

References

Feb 14, 2006·The Journal of Physical Chemistry. B·Jongwon Kim, Andrew A Gewirth
Jan 16, 2007·Science·Vojislav R StamenkovicNenad M Marković
Feb 21, 2007·Nature Materials·Vojislav R StamenkovicNenad M Markovic
Apr 21, 2010·Journal of the American Chemical Society·Dingsheng Wang, Yadong Li
Mar 19, 2011·Journal of the American Chemical Society·Boon Siang Yeo, Alexis T Bell
Jul 19, 2013·Journal of the American Chemical Society·Mary W Louie, Alexis T Bell
Aug 16, 2013·Journal of the American Chemical Society·Michal BajdichAlexis T Bell
Mar 26, 2014·Journal of the American Chemical Society·Yelena GorlinThomas F Jaramillo
May 2, 2014·Journal of the American Chemical Society·Lena TrotochaudShannon W Boettcher
May 1, 2015·Journal of the American Chemical Society·Haifeng LvShouheng Sun
Feb 18, 2016·Chemical Reviews·Minhua ShaoRegis Chenitz
Mar 26, 2016·Science·Bo ZhangEdward H Sargent
Aug 10, 2016·Nature Communications·Xiang XuXile Hu
Sep 14, 2016·Advanced Materials·Yi JiaXiangdong Yao
Oct 18, 2016·Advanced Materials·Zhaoke ZhengRose Amal

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Citations

Apr 3, 2019·Chemistry : a European Journal·Rui XiangZidong Wei
Nov 26, 2020·Journal of Colloid and Interface Science·Mengmeng JinLinfei Lai
Feb 9, 2021·Small·Anupam YadavPeter Lievens
Oct 31, 2018·Accounts of Chemical Research·Hongliang JiangLi Song
Oct 15, 2021·Advanced Materials·Jichuan QiuYounan Xia

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