Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2020 Apr;32(17):e2000455.
doi: 10.1002/adma.202000455. Epub 2020 Mar 16.

Interfacial Engineering of MoO2 -FeP Heterojunction for Highly Efficient Hydrogen Evolution Coupled with Biomass Electrooxidation

Ganceng Yang  1 , Yanqing Jiao  1 , Haijing Yan  1 , Ying Xie  1 , Aiping Wu  1 , Xue Dong  1 , Dezheng Guo  1 , Chungui Tian  1 , Honggang Fu  1
Affiliations

Interfacial Engineering of MoO2 -FeP Heterojunction for Highly Efficient Hydrogen Evolution Coupled with Biomass Electrooxidation

Ganceng Yang et al. Adv Mater. 2020 Apr.

Abstract

Simultaneous highly efficient production of hydrogen and conversion of biomass into value-added products is meaningful but challenging. Herein, a porous nanospindle composed of carbon-encapsulated MoO2 -FeP heterojunction (MoO2 -FeP@C) is proposed as a robust bifunctional electrocatalyst for hydrogen evolution reaction (HER) and biomass electrooxidation reaction (BEOR). X-ray photoelectron spectroscopy analysis and theoretical calculations confirm the electron transfer from MoO2 to FeP at the interfaces, where electron accumulation on FeP favors the optimization of H2 O and H* absorption energies for HER, whereas hole accumulation on MoO2 is responsible for improving the BEOR activity. Thanks to its interfacial electronic structure, MoO2 -FeP@C exhibits excellent HER activity with an overpotential of 103 mV at 10 mA cm-2 and a Tafel slope of 48 mV dec-1 . Meanwhile, when 5-hydroxymethylfurfural is chosen as the biomass for BEOR, the conversion is almost 100%, and 2,5-furandicarboxylic acid (FDCA) is obtained with the selectivity of 98.6%. The electrolyzer employing MoO2 -FeP@C for cathodic H2 and anodic FDCA production requires only a low voltage of 1.486 V at 10 mA cm-2 and can be powered by a solar cell (output voltage: 1.45 V). Additionally, other BEORs coupled with HER catalyzed by MoO2 -FeP@C also have excellent catalytic performance, implying their good versatility.

Keywords: biomass electrooxidation; electron transfer; heterojunctions; hydrogen evolution; porous nanospindles.

PubMed Disclaimer

References

    1. J. A. Turner, Science 1999, 285, 687.
    1. Y. Jiao, Y. Zheng, M. Jaroniec, S. Z. Qiao, Chem. Soc. Rev. 2015, 44, 2060.
    1. Y. X. Chen, A. Lavacchi, H. A. Miller, M. Bevilacqua, J. Filippi, M. Innocenti, A. Marchionni, W. Oberhauser, L. Wang, F. Vizza, Nat. Commun. 2014, 5, 4036.
    1. W. Wang, Y. Zhu, Q. Wen, Y. Wang, J. Xia, C. Li, M. Chen, Y. Liu, H. Li, H. Wu, T. Zhai, Adv. Mater. 2019, 31, 1900528.
    1. E. Hayashi, Y. Yamaguchi, K. Kamata, N. Tsunoda, Y. Kumagai, F. Oba, M. Hara, J. Am. Chem. Soc. 2019, 141, 890.

LinkOut - more resources