Interface synergism and engineering of Pd/Co@N-C for direct ethanol fuel cells

Chang, Jinfa; Wang, Guanzhi; Chang, Xiaoxia; Yang, Zhenzhong; Wang, Han; Li, Boyang; Zhang, Wei; Kovarik, Libor; Du, Yingge; Orlovskaya, Nina; Xu, Bingjun; Wang, Guofeng; Yang, Yang

doi:10.1038/s41467-023-37011-z

Title: Interface synergism and engineering of Pd/Co@N-C for direct ethanol fuel cells

Journal Article · Sat Mar 11 00:00:00 UTC 2023 · Nature Communications

DOI: https://doi.org/10.1038/s41467-023-37011-z · OSTI ID:1968868

^[1]; Wang, Guanzhi ^[1]; Chang, Xiaoxia ^[2]; Yang, Zhenzhong ^[3]; Wang, Han ^[3];

^[4];

^[1]; Kovarik, Libor ^[3];

^[3]; Orlovskaya, Nina ^[1]; Xu, Bingjun ^[2];

^[4];

^[1]

University of Central Florida, Orlando, FL (United States)
University of Delaware, Newark, DE (United States)
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
University of Pittsburgh, PA (United States)

Direct ethanol fuel cells have been widely investigated as nontoxic and low-corrosive energy conversion devices with high energy and power densities. It is still challenging to develop high-activity and durable catalysts for a complete ethanol oxidation reaction on the anode and accelerated oxygen reduction reaction on the cathode. The materials’ physics and chemistry at the catalytic interface play a vital role in determining the overall performance of the catalysts. Herein, we propose a Pd/Co@N-C catalyst that can be used as a model system to study the synergism and engineering at the solid-solid interface. Particularly, the transformation of amorphous carbon to highly graphitic carbon promoted by cobalt nanoparticles helps achieve the spatial confinement effect, which prevents structural degradation of the catalysts. The strong catalyst-support and electronic effects at the interface between palladium and Co@N-C endow the electron-deficient state of palladium, which enhances the electron transfer and improved activity/durability. The Pd/Co@N-C delivers a maximum power density of 438 mW cm^-2 in direct ethanol fuel cells and can be operated stably for more than 1000 hours. This work presents a strategy for the ingenious catalyst structural design that will promote the development of fuel cells and other sustainable energy-related technologies.

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Biological and Environmental Research (BER); University of Central Florida

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 1968868

Report Number(s):: PNNL-SA-154109

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 14; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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25 ENERGY STORAGE
bifunctional catalyst
direct ethanol fuel cells
high power density
palladium
tri-synergism

Title: Interface synergism and engineering of Pd/Co@N-C for direct ethanol fuel cells

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