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Hierarchical Nanoassembly of MoS2/Co9S8/Ni3S2/Ni as a Highly Efficient Electrocatalyst for Overall Water Splitting in a Wide pH Range
Abstract
The design of low-cost yet high-efficiency electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) over a wide pH range is highly challenging. We now report a hierarchical co-assembly of interacting MoS 2 and Co 9 S 8 nanosheets attached on Ni 3 S 2 nanorod arrays which are supported on nickel foam (NF). This tiered structure endows high performance toward HER and OER over a very broad pH range. By adjusting the molar ratio of the Co:Mo precursors, we have created CoMoNiS-NF- xy composites ( x: y means Co:Mo molar ratios ranging from 5:1 to 1:3) with controllable morphology and composition. The three-dimensional composites have an abundance of active sites capable of universal pH catalytic HER and OER activity. The CoMoNiS-NF-31 demonstrates the best electrocatalytic activity, giving ultralow overpotentials (113, 103, and 117 mV for HER and 166, 228, and 405 mV for OER) to achieve a current density of 10 mA cm –2 in alkaline, acidic, and neutral electrolytes, respectively. It also shows a remarkable balance between electrocatalytic activity and stability. Based on the distinguished catalytic performance of CoMoNiS-NF-31 toward HER and OER, we demonstrate a two-electrode electrolyzer performing water electrolysis over a wide pH range, with low cell voltages of 1.54, 1.45, and 1.80 V at 10 mA cm –2 in alkaline, acidic, and neutral media, respectively. First-principles calculations suggest that the high OER activity arises from electron transfer from Co 9 S 8 to MoS 2 at the interface, which alters the binding energies of adsorbed species and decreases overpotentials. Our results demonstrate that hierarchical metal sulfides can serve as highly efficient all-pH (pH = 0–14) electrocatalysts for overall water splitting.
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Cited by
Yu, L., Wu, L., McElhenny, B., Song, S., Luo, D., Zhang, F., Yu, Y., Chen, S., & Ren, Z. (2020) · Energy & Environmental Science · doi:10.1039/d0ee00921k · Cited by 877
Bifunctional Electrocatalysts for Overall and Hybrid Water Splitting
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Luo, X., Ji, P., Wang, P., Cheng, R., Chen, D., Lin, C., Zhang, J., He, J., Shi, Z., Li, N., et al. (2020) · Advanced Energy Materials · doi:10.1002/aenm.201903891 · Cited by 636
Chen, J., Chen, C., Qin, M., Li, B., Lin, B., Mao, Q., Yang, H., Liu, B., & Wang, Y. (2022) · Nature Communications · doi:10.1038/s41467-022-33007-3 · Cited by 616
High‐Entropy Metal Sulfide Nanoparticles Promise High‐Performance Oxygen Evolution Reaction
Cui, M., Yang, C., Li, B., Dong, Q., Wu, M., Hwang, S., Xie, H., Wang, X., Wang, G., & Hu, L. (2021) · Advanced Energy Materials · doi:10.1002/aenm.202002887 · Cited by 523
Metadata
- Authors
- Yang, Y., Yao, H., Yu, Z., Islam, S. M., He, H., Yuan, M., Yue, Y., Xu, K., Hao, W., Sun, G., Li, H., Ma, S., Zapol, P., & Kanatzidis, M. G.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-06-06
- Volume
- 141
- Issue
- 26
- Pages
- 10417-10430
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2952514118
- Cited by
- 911
- References
- 17
- FWCI
- 23.24
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yang, Y., Yao, H., Yu, Z., Islam, S. M., He, H., Yuan, M., Yue, Y., Xu, K., Hao, W., Sun, G., Li, H., Ma, S., Zapol, P., & Kanatzidis, M. G. (2019). Hierarchical Nanoassembly of MoS2/Co9S8/Ni3S2/Ni as a Highly Efficient Electrocatalyst for Overall Water Splitting in a Wide pH Range. Journal of the American Chemical Society. https://doi.org/10.1021/jacs.9b04492
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