Work

Current perspectives on rational design of anode electrocatalysts exhibiting CO-tolerance for fuel cells

Year: 2024

Type: review

Abstract: Anode catalysis reduces the cost and remarkably improves the fuel cell performance; however, it is often neglected owing to its fast kinetics. Currently, the majority of hydrogen is obtained by reforming and purifying the hydrocarbons containing impurities such as CO, CO 2 , and H 2 S. CO adsorbs more strongly than hydrogen onto the anode catalysts, inhibiting hydrogen oxidation and resulting in performance degradation. Although activity enhancement is essential, impurity tolerance should be preferred over activity for fuel-cell anode catalysts. Various studies have reported improved CO tolerance via lowering the intrinsic CO adsorption energy of the catalyst by tuning the electronic structure or modulating the OH adsorption energy by placing oxophilic materials near the catalysts. Herein, we categorize recent noteworthy studies according to their strategies and present innovative design principles for CO-resistant anode catalysts.

Source: Current Opinion in Electrochemistry

DOI: 10.1016/j.coelec.2024.101582

Authors: Daeil Choi, Subin Park, Yun Sik Kang, Sung Jong Yoo

Institutions: Korea Institute of Science and Technology, Korea Institute of Energy Research, Korea University of Science and Technology

Language: English

Topic: Electrocatalysts for Energy Conversion

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,520