Highly porous non-precious bimetallic electrocatalysts for efficient hydrogen evolution

Qi Lu, Gregory S. Hutchings, Weiting Yu, Yang Zhou, Robert V. Forest, Runzhe Tao, Jonathan Rosen, Bryan T. Yonemoto, Zeyuan Cao, Haimei Zheng, John Q. Xiao, Feng Jiao () and Jingguang G. Chen ()
Additional contact information
Qi Lu: Center for Catalytic Science and Technology, University of Delaware
Gregory S. Hutchings: Center for Catalytic Science and Technology, University of Delaware
Weiting Yu: Columbia University
Yang Zhou: University of Delaware
Robert V. Forest: Center for Catalytic Science and Technology, University of Delaware
Runzhe Tao: Lawrence Berkeley National Laboratory
Jonathan Rosen: Center for Catalytic Science and Technology, University of Delaware
Bryan T. Yonemoto: Center for Catalytic Science and Technology, University of Delaware
Zeyuan Cao: University of Delaware
Haimei Zheng: Lawrence Berkeley National Laboratory
John Q. Xiao: University of Delaware
Feng Jiao: Center for Catalytic Science and Technology, University of Delaware
Jingguang G. Chen: Columbia University

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract A robust and efficient non-precious metal catalyst for hydrogen evolution reaction is one of the key components for carbon dioxide-free hydrogen production. Here we report that a hierarchical nanoporous copper-titanium bimetallic electrocatalyst is able to produce hydrogen from water under a mild overpotential at more than twice the rate of state-of-the-art carbon-supported platinum catalyst. Although both copper and titanium are known to be poor hydrogen evolution catalysts, the combination of these two elements creates unique copper-copper-titanium hollow sites, which have a hydrogen-binding energy very similar to that of platinum, resulting in an exceptional hydrogen evolution activity. In addition, the hierarchical porosity of the nanoporous copper-titanium catalyst also contributes to its high hydrogen evolution activity, because it provides a large-surface area for electrocatalytic hydrogen evolution, and improves the mass transport properties. Moreover, the catalyst is self-supported, eliminating the overpotential associated with the catalyst/support interface.

Date: 2015
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DOI: 10.1038/ncomms7567

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