Alloying-Triggered Phase Engineering of NiFe System via Laser-Assisted Al Incorporation for Full Water Splitting

Xiaoyu Liu; Haolin Lu; Shengli Zhu; Zhenduo Cui; Zhaoyang Li; Shuilin Wu; Wence Xu; Yanqin Liang; Guankui Long; Hui Jiang

doi:10.1002/anie.202300800

Alloying-Triggered Phase Engineering of NiFe System via Laser-Assisted Al Incorporation for Full Water Splitting

Angew Chem Int Ed Engl. 2023 Mar 20;62(13):e202300800. doi: 10.1002/anie.202300800. Epub 2023 Feb 15.

Authors

Xiaoyu Liu¹, Haolin Lu², Shengli Zhu^{1

3

4}, Zhenduo Cui^{1

3

4}, Zhaoyang Li^{1

3

4}, Shuilin Wu^{1

3

4

5}, Wence Xu^{1

3

4}, Yanqin Liang^{1

3

4}, Guankui Long², Hui Jiang^{1

3

4

6}

Affiliations

¹ School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, China.
² School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin, 300350, China.
³ Tianjin Key Laboratory of Composite and Functional Materials, Tianjin, 300350, China.
⁴ Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin, 300350, China.
⁵ School of Materials Science & Engineering, Peking University, Beijing, 100871, China.
⁶ Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin, 300350, China.

PMID: 36720713
DOI: 10.1002/anie.202300800

Abstract

It is challenging to design one non-noble material with balanced bifunctional performance for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for commercial sustainability at a low cost since the different electrocatalytic mechanisms are not easily matchable for each other. Herein, a self-standing hybrid system Ni₁₈ Fe₁₂ Al₇₀ , consisting of Ni₂ Al₃ and Ni₃ Fe phases, was constructed by laser-assisted aluminum (Al) incorporation towards full water splitting. It was found that the incorporation of Al could effectively tune the morphologies, compositions and phases. The results indicate that Ni₁₈ Fe₁₂ Al₇₀ delivers an extremely low overpotential to trigger both HER (η₁₀₀ =188 mV) and OER (η₁₀₀ =345 mV) processes and maintains a stable overpotential for 100 h, comparable to state-of-the-art electrocatalysts. The synergistic effect of Ni₂ Al₃ and Ni₃ Fe alloys on the HER process is confirmed based on theoretical calculation.

Keywords: Incorporation; NiAl; NiFe; Water Splitting; the Synergistic Effect.

Abstract

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