puc-header

Designing Highly Active High Current Density HER Electrocatalysts: Synergistic Effects of Mo and W in α-Mo xW 1-XB 2 with Graphene-Like Boron Layers

35 Pages Posted: 26 Oct 2018 Sneak Peek Status: Under Review

See all articles by Hyounmyung Park

Hyounmyung Park

University of California, Riverside (UCR) - Department of Chemistry

Eunsoo Lee

University of California, Riverside (UCR) - Department of Chemistry

Pritam Shankhari

University of California, Riverside (UCR) - Department of Chemistry

Boniface P.T. Fokwa

University of California, Riverside (UCR) - Department of Chemistry

More...

Abstract

Transition metal borides belong to a small class of non-noble-metal electrocatalysts which exhibit excellent activity toward hydrogen evolution reaction (HER) already in bulk form, especially those containing the graphene-like (flat) boron layer such as α-MoB2 are particularly promising. In this study, we show that tungsten, whose diboride (β-WB2) contains the less active puckered (phosphorene-like) boron layer, can be successfully substituted (up to 30%) for molybdenum in α-MoB2. The resulting α-MoxW1-xB2 exhibits far better HER activity and stability than α-MoB2. Furthermore, α-MoxW1-xB2 performs particularly well at high current density, outperforming even bulk platinum above 70 and 125 mA/cm2 in basic and acidic electrolytes, respectively. This result should pave the way for high current density, abundant and inexpensive bulk and nanoscale HER catalysts.

Keywords: Abundant electrocatalysts; HER; Solid solution; α-MoxW1-xB2; high current density

Suggested Citation

Park, Hyounmyung and Lee, Eunsoo and Shankhari, Pritam and Fokwa, Boniface P.T., Designing Highly Active High Current Density HER Electrocatalysts: Synergistic Effects of Mo and W in α-Mo xW 1-XB 2 with Graphene-Like Boron Layers (October 26, 2018). Available at SSRN: https://ssrn.com/abstract=3273390 or http://dx.doi.org/10.2139/ssrn.3273390
This is a paper under consideration at Cell Press and has not been peer-reviewed.

Hyounmyung Park

University of California, Riverside (UCR) - Department of Chemistry

900 University Avenue
Riverside, CA 92521
United States

Eunsoo Lee

University of California, Riverside (UCR) - Department of Chemistry

900 University Avenue
Riverside, CA 92521
United States

Pritam Shankhari

University of California, Riverside (UCR) - Department of Chemistry

900 University Avenue
Riverside, CA 92521
United States

Boniface P.T. Fokwa (Contact Author)

University of California, Riverside (UCR) - Department of Chemistry ( email )

900 University Avenue
Riverside, CA 92521
United States

Click here to go to Cell.com

Go to Cell.com

Paper statistics

Abstract Views
272
Downloads
7