Stainless steel is widely utilized in industrial applications of alkaline water electrolysis due to its high anticorrosion property, but it usually suffers from low catalytic activity. The complete activation of stainless steel to improve its efficiency while maintaining its excellent corrosion resistance is thus important for lowering the energy consumption of H2 production. Here, we developed an ultrafast one-step activation for stainless steel based on high-temperature heat treatment and quenching in an aqueous solution. After the activation, the resulting Ni-doped stainless-steel mat (Ni-SSM) exhibited significantly improved activity for both the hydrogen evolution reaction and the oxygen evolution reaction in comparison to pristine SSM. When assembled for overall water electrolysis, Ni-SSM delivered a current density of 100 mA/cm2 at a cell voltage of 1.72 V in 1 M KOH at 25 degrees C, outperforming most of the stainless-steel-based electrodes reported thus far. Under a quasi-industrial environment of 6 M KOH at 60 degrees C, Ni-SSM displayed extraordinary performance, producing a current density of 500 mA/cm2 at a low cell voltage of 1.615 V. Further durability testing showed that Ni-SSM maintains high performance at a current density of 500 mA/cm2 under this quasi-industrial environment for at least 150 h. Similar activation processes were applied to different substrates to verify the versatility of this strategy, and enhanced performance for alkaline water electrolysis was observed among all the selected substrates. Finally, 5 x 5 cm2 pieces of Ni-SSM were prepared and assembled in an anion exchange membrane (AEM) electrolyzer, in which they delivered a current of 12.5 A at a cell voltage of 1.93 V in 1 M KOH at 65 degrees C. Therefore, the effectiveness of this activation strategy for improving activity and its feasibility and versatility together suggest its great potential for industrial application.
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Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R ChinaHunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
Lyu, Yanhong
Wang, Ruilun
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Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R ChinaHunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
Wang, Ruilun
Tao, Li
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Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R ChinaHunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
Tao, Li
Zou, Yuqin
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Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R ChinaHunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
Zou, Yuqin
Zhou, Huaijuan
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Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R ChinaHunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
Zhou, Huaijuan
Liu, Tingting
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Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R ChinaHunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
Liu, Tingting
Zhou, Yangyang
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Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R ChinaHunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
Zhou, Yangyang
Huo, Jia
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Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R ChinaHunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
Huo, Jia
Jiang, San Ping
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Curtin Univ, Western Australian Sch Mines Minerals Energy & Ch, Perth, WA 6102, Australia
Curtin Univ, Fuels & Energy Technol Inst, Perth, WA 6102, AustraliaHunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
Jiang, San Ping
Zheng, Jianyun
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Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R ChinaHunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
Zheng, Jianyun
Wang, Shuangyin
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Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R ChinaHunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
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Korea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South KoreaKorea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South Korea
Song, DongHoon
Hong, Doosun
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Korea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South KoreaKorea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South Korea
Hong, Doosun
Kwon, YongKeun
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Korea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South KoreaKorea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South Korea
Kwon, YongKeun
Kim, HyoWon
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Korea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South KoreaKorea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South Korea
Kim, HyoWon
Shin, Jaewook
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Korea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South Korea
Korea Adv Inst Sci & Technol KAIST, KAIST Inst NanoCentury, Adv Battery Ctr, 291 Daehak Ro, Daejeon 34141, South KoreaKorea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South Korea
Shin, Jaewook
Lee, Hyuck Mo
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Korea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South KoreaKorea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South Korea
Lee, Hyuck Mo
Cho, EunAe
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Korea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South KoreaKorea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 34141, South Korea