Sustainable Electrochemical Hydrogen Production

Jakob Kibsgaard, Thomas F. Jaramillo, Ib Chorkendorff

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

Abstract

Molecular hydrogen (H2) is one of the world's most important chemicals with a global production rate of approximately 50 billion kg per year. Today hydrogen is mainly used for petroleum refining and for synthesizing ammonia-based fertilizers but hydrogen also hold promise for the transportation sector using fuel cell vehicles. As hydrogen is mainly produced from fossil fuels, developing an alternative, renewable pathway to produce H2 in a cost-competitive manner would have a significant impact in reducing fossil fuel consumption and CO2 emissions. One attractive pathway for clean hydrogen production is through electrochemical processes coupled to renewable energy sources such as wind or solar.

The hydrogen evolution reaction (HER, 2H+ + 2e → H2) constitutes half of the water splitting reaction. To increase process efficiency, active catalysts for the HER are needed. Currently platinum is the best known HER catalyst as only small overpotentials are required to drive high reaction rates, but the scarcity and high cost of Pt may limit its widespread technological use. This has sparked a search for Earth-abundant catalysts that potentially could replace Pt - a search where the development of molybdenum sulfide (MoS2)-based HER catalysts serves as an excellent example of theory-guided discovery and design of new electrocatalysts.

For decades, MoS2 was believed to be inactive for the HER. However, inspired by hydrogen-producing enzymes such as hydrogenase and nitrogenase in nature, theoretical calculations predicted the edges of MoS2 layers to be active. Guided by these calculations, several nanostructured MoS2 catalysts have been synthesized to expose edge sites. In my talk, I will show this extraordinary development of non-precious metal HER catalysts and highlight a specific example of one such catalyst; [Mo3S13]2- nanoclusters.
Original languageEnglish
Publication date2016
Number of pages1
Publication statusPublished - 2016
EventSustain-ATV Conference 2016: Creating Technology for a Sustainable Society - Technical University of Denmark, Kgs. Lyngby, Denmark
Duration: 30 Nov 201630 Nov 2016
http://www.sustain.dtu.dk/about/sustain-2016

Conference

ConferenceSustain-ATV Conference 2016
LocationTechnical University of Denmark
CountryDenmark
CityKgs. Lyngby
Period30/11/201630/11/2016
Internet address

Bibliographical note

Sustain Abstract P-2

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