Composition-dependent hydrogen oxidation activity of Pt–Cu nanoparticles prepared using boron-rich nanosheets
Bhagyashri
Gaykwad, 
†ab
Donald A.
Robinson,
†a
Nicholas
Humphrey,
a
Samuel F.
Wenzel,
c
Natalia
McCoy,
a
Farid
El Gabaly,
a
Joshua D.
Sugar,
a
Matthew D.
Witman,
a
Kabeer
Jasuja,
*b
Hang
Ren
*c
and
Vitalie
Stavila
*a
†ab
Donald A.
Robinson,
†a
Nicholas
Humphrey,
a
Samuel F.
Wenzel,
c
Natalia
McCoy,
a
Farid
El Gabaly,
a
Joshua D.
Sugar,
a
Matthew D.
Witman,
a
Kabeer
Jasuja,
*b
Hang
Ren
*c
and
Vitalie
Stavila
*a
Abstract
Pt–Cu alloy nanoparticles were synthesized via a scalable co-reduction process using boron-rich nanosheets. Pt : Cu ratio was systematically varied to evaluate catalytic performance for the hydrogen oxidation reaction in alkaline media. The optimal Pt77Cu23 catalyst composition exhibits high Pt surface-specific activity, outperforming Pt-based catalysts. DFT calculations attribute the enhanced electrocatalytic activity to d-band center tuning, which modulates the intermediates adsorption strength.
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