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dc.contributor.authorQiu, Yang
dc.contributor.authorXin, Le
dc.contributor.authorLi, Yawei
dc.contributor.authorMcCrum, Ian T.
dc.contributor.authorGuo, Fangmin
dc.contributor.authorMa, Tao
dc.contributor.authorRen, Yang
dc.contributor.authorLiu, Qi
dc.contributor.authorZhou, Lin
dc.contributor.authorGu, Shuang
dc.contributor.authorJanik, Michael J.
dc.contributor.authorLi, Wenzhen
dc.identifier.citationYang Qiu, Le Xin, Yawei Li, Ian T. McCrum, Fangmin Guo, Tao Ma, Yang Ren, Qi Liu, Lin Zhou, Shuang Gu, Michael J. Janik, and Wenzhen Li. BCC-Phased PdCu Alloy as a highly active electrocatalyst for hydrogen oxidation in alkaline electrolytes. Journal of the American Chemical Society 2018 140 (48), 16580-16588en_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractAnion-exchange membrane fuel cells hold promise to greatly reduce cost by employing nonprecious metal cathode catalysts. More efficient anode catalysts are needed, however, to improve the sluggish hydrogen oxidation reaction in alkaline electrolytes. We report that BCC-phased PdCu alloy nanoparticles, synthesized via a wet-chemistry method with a critical thermal treatment, exhibit up to 20-fold HOR improvement in both mass and specific activities, compared with the FCC-phased PdCu counterparts. HOR activity of the BCC-phased PdCu is 4 times or 2 times that of Pd/C or Pt/C, respectively, in the same alkaline electrolyte. In situ HE-XRD measurements reveal that the transformation of PdCu crystalline structure favors, at low annealing temperature (<300 °C), the formation of FCC structure. At higher annealing temperatures (300-500 °C), a BCC structure dominates the PdCu NPs. Density functional theory (DFT) computations unravel a similar H binding strength and a much stronger OH binding of the PdCu BCC surface (cf. FCC surface), both of which are simultaneously close to those of Pt surfaces. The synergistic optimization of both H and OH binding strengths is responsible for the enhancement of HOR activity on BCC-phased PdCu, which could serve as an efficient anode catalyst for anion-exchange membrane fuel cells. This work might open a new route to develop efficient HOR catalysts from the perspective of crystalline structure transformation.en_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.ispartofseriesJournal of the American Chemical Society;v.140:no.48
dc.titleBCC-Phased PdCu Alloy as a highly active electrocatalyst for hydrogen oxidation in alkaline electrolytesen_US
dc.rights.holder© 2018 American Chemical Societyen_US

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