The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.
Tuning Electronic Push/Pull of Ni-Based Hydroxides To Enhance Hydrogen and Oxygen Evolution Reactions for Water Splitting
Abstract
Enhancing the efficiency of non-noble electrocatalysts in hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for water splitting remains a challenging task. Herein, we report an electronic push/pull effect of Co and Fe doping on the HER and OER performance of Ni-based hydroxides as revealed by thorough cyclic voltammetry and X-ray photoelectron spectroscopy analysis. A Fe dopant pulls partial electrons from nearby Ni/Co active sites resulting in a higher electron affinity at the Ni/Co sites to facilitate OH – adsorption and charge transfer from the adsorbed OH – for OER. In contrast, a Co dopant tends to push its partial electrons to nearby Ni sites and increase the number of lattice O 2– as proton adsorption sites, which lead to faster charge transfer for HER. By adjusting the contents of Co/Fe dopants in Ni-based hydroxides, we were able to tune the electronic configuration of the catalyst and to optimize the OER and HER performance specifically. An optimized catalyst with a composition of Ni 0.8 Co 0.1 Fe 0.1 O x H y showed excellent OER performance with an overpotential (η) of 239 mV at 10 mA·cm –2 and a Tafel slope of 45.4 mV·dec –1 . The HER performance was optimized with a catalyst composition of Ni 0.9 Co 0.1 O x H y and reached an η of 85 mV at 10 mA·cm –2 and a Tafel slope of 84.5 mV·dec –1 . Overall water splitting with Ni 0.8 Co 0.1 Fe 0.1 O x H y as the anode and Ni 0.9 Co 0.1 O x H y as the cathode was demonstrated at a low potential of 1.58 V at 10 mA·cm –2 . Utilizing the electronic push/pull effect by dopant elements provides a new pathway for the design and optimization of the transition hydroxides as HER and OER catalysts.
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Shinagawa, T., Garcia-Esparza, A. T., & Takanabe, K. (2015) · Scientific Reports · doi:10.1038/srep13801 · Cited by 3,287
Wang, H., Lee, H.-W., Deng, Y., Lu, Z., Hsu, P.-C., Liu, Y., Lin, D., & Cui, Y. (2015) · Nature Communications · doi:10.1038/ncomms8261 · Cited by 1,257
Self-citationMa, W., Ma, R., Wang, C., Liang, J., Liu, X., Zhou, K., & Sasaki, T. (2015) · ACS Nano · doi:10.1021/nn5069836 · Cited by 714
You, B., Jiang, N., Sheng, M., Gul, S., Yano, J., & Sun, Y. (2015) · Chemistry of Materials · doi:10.1021/acs.chemmater.5b02877 · Cited by 631
Li, X., Han, G.-Q., Liu, Y.-R., Dong, B., Hu, W.-H., Shang, X., Chai, Y.-M., & Liu, C.-G. (2016) · ACS Applied Materials & Interfaces · doi:10.1021/acsami.6b05597 · Cited by 270
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Shan, J., Ling, T., Davey, K., Zheng, Y., & Qiao, S. (2019) · Advanced Materials · doi:10.1002/adma.201900510 · Cited by 642
Qin, R., Wang, Y., Zhang, M., Wang, Y., Ding, S., Song, A., Yi, H., Yang, L., Song, Y., Cui, Y., et al. (2021) · Nano Energy · doi:10.1016/j.nanoen.2020.105478 · Cited by 585
Self-citationDesigning a Built-In Electric Field for Efficient Energy Electrocatalysis
Zhao, X., Liu, M., Wang, Y., Xiong, Y., Yang, P., Qin, J., Xiong, X., & Lei, Y. (2022) · ACS Nano · doi:10.1021/acsnano.2c09888 · Cited by 437
Self-citationAdsorption Energy in Oxygen Electrocatalysis
Zhang, J., Yang, H. B., Zhou, D., & Liu, B. (2022) · Chemical Reviews · doi:10.1021/acs.chemrev.1c01003 · Cited by 299
Bifunctional Electrocatalysts Based on Mo-Doped NiCoP Nanosheet Arrays for Overall Water Splitting
Lin, J., Yan, Y., Li, C., Si, X., Wang, H., Qi, J., Cao, J., Zhong, Z., Fei, W., & Feng, J. (2019) · Nano-Micro Letters · doi:10.1007/s40820-019-0289-6 · Cited by 197
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Metadata
- Authors
- Zhao, Q., Yang, J., Liu, M., Wang, R., Zhang, G., Wang, H., Tang, H., Liu, C., Mei, Z., Chen, H., & Pan, F.
- Venue
- ACS Catalysis
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-05-14
- Volume
- 8
- Issue
- 6
- Pages
- 5621-5629
- ISSN
- 2155-5435 (ISSN-L)
- OpenAlex
- W2802280245
- Cited by
- 186
- References
- 5
- FWCI
- 4.86
- Type
- journal article
- Language
- en
- Open access
- closed
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