Chromium‐Induced High Covalent Co–O Bonds for Efficient Anodic Catalysts in PEM Electrolyzer DOI Creative Commons
Qisheng Yan, Jie Feng, Wen‐Juan Shi

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(25)

Published: April 22, 2024

Abstract The proton exchange membrane water electrolyzer (PEMWE), crucial for green hydrogen production, is challenged by the scarcity and high cost of iridium‐based materials. Cobalt oxides, as ideal electrocatalysts oxygen evolution reaction (OER), have not been extensively applied in PEMWE, due to extremely voltage poor stability at large current density, caused complicated structural variations cobalt compounds during OER process. Thus, authors sought introduce chromium into a spinel (Co 3 O 4 ) catalyst regulate electronic structure cobalt, exhibiting higher oxidation state increased Co–O covalency with stable structure. In‐depth operando characterizations theoretical calculations revealed that activated adaptable redox behavior are facilitating its activity. Both turnover frequency mass activity Cr‐doped Co (CoCr) 1.67 V (vs RHE) over eight times than those as‐synthesized . obtained CoCr achieved 1500 mA cm −2 2.17 exhibited notable durability extended operation periods – 100 h 500 , demonstrating promising application PEMWE industry.

Language: Английский

Ru/Ir‐Based Electrocatalysts for Oxygen Evolution Reaction in Acidic Conditions: From Mechanisms, Optimizations to Challenges DOI Creative Commons
Rong Qin, Guanzhen Chen,

Caihong Feng

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(21)

Published: March 19, 2024

Abstract The generation of green hydrogen by water splitting is identified as a key strategic energy technology, and proton exchange membrane electrolysis (PEMWE) one the desirable technologies for converting renewable sources into hydrogen. However, harsh anode environment PEMWE oxygen evolution reaction (OER) involving four‐electron transfer result in large overpotential, which limits overall efficiency production, thus efficient electrocatalysts are needed to overcome high overpotential slow kinetic process. In recent years, noble metal‐based (e.g., Ru/Ir‐based metal/oxide electrocatalysts) have received much attention due their unique catalytic properties, already become dominant acidic OER process applied commercial devices. these still face thorny problem conflicting performance cost. this review, first, metal briefly classified according forms existence, mechanisms outlined. Then, focus on summarizing improvement strategies with respect activity stability over years. Finally, challenges development prospects discussed.

Language: Английский

Citations

71
Recent advances in Ru/Ir-based electrocatalysts for acidic oxygen evolution reaction DOI Creative Commons

Guoliang Gao,

Zixu Sun, Xueli Chen

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 343, P. 123584 - 123584

Published: Dec. 1, 2023

The electrocatalytic process of water splitting offers a promising approach to produce sustainable hydrogen. However, the slow kinetics oxygen evolution reaction (OER) presents notable challenge, especially in acidic environment proton exchange membrane (PEM) systems. Despite extensive progress made catalyst development for hydrogen production through electrolysis last century, significant advancements have been accomplished. quest OER catalysts that possess both high activity and stability, while also being affordable, continues be challenging. Currently, Ru/Ir-based electrocatalysts are only practical anode available. Therefore, it is crucial explore feasible strategies enhance performance longevity catalysts. This review comprehensive assessment obstacles prospective Additionally, underscores areas research concentration, providing valuable perspectives future endeavors development.

Language: Английский

Citations

66
Lattice Oxygen Redox Mechanisms in the Alkaline Oxygen Evolution Reaction DOI
Xiangrong Ren, Yiyue Zhai, Na Yang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: March 25, 2024

Abstract Understanding of fundamental mechanism and kinetics the oxygen evolution reaction (OER) is pivotal for designing efficient OER electrocatalysts owing to its key role in electrochemical energy conversion devices. In past few years, lattice oxidation (LOM) arising from anodic redox chemistry has attracted significant attention as it involves a direct O─O coupling thus bypasses thermodynamic limitations traditional adsorbate (AEM). Transition metal‐based oxyhydroxides are generally acknowledged real catalytic phase alkaline media. particular, their low‐dimensional layered structures offer sufficient structural flexibility trigger LOM. Herein, comprehensive overview provided recent advances anion LOM‐based electrocatalysts. Based on analyses electronic structure LOM, strategy proposed activate Possible identification techniques corroboration also reviewed. addition, reconstruction process induced by LOM focused importance multiple situ/operando characterizations highlighted unveil chemical origins To conclude, prospect remaining challenges future opportunities presented.

Language: Английский

Citations

53
Transition metal-based electrocatalysts for alkaline overall water splitting: advancements, challenges, and perspectives DOI
Muhammad Nazim Lakhan, Abdul Hanan,

Altaf Hussain

et al.

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(39), P. 5104 - 5135

Published: Jan. 1, 2024

This review has examined the advancements and challenges in development of transition metal-based electrocatalysts for alkaline water splitting reaction last decade.

Language: Английский

Citations

49
Electrocatalytic acidic oxygen evolution: From catalyst design to industrial applications DOI Creative Commons
Zhihao Pei, Huabin Zhang, Deyan Luan

et al.

Matter, Journal Year: 2023, Volume and Issue: 6(12), P. 4128 - 4144

Published: Dec. 1, 2023

Language: Английский

Citations

45
Metal‐Organic Framework‐Based Electrocatalysts for Acidic Water Splitting DOI

Shenghao Zhou,

Lei Shi, Yanzhe Li

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(34)

Published: March 13, 2024

Abstract The proton exchange membrane water electrolysis system has long been considered a promising technique for the generation of hydrogen owing to its high electrolytic efficiency, reliability, and quick response renewable energy sources. At present, noble metals their oxides (e.g., Pt, IrO 2 , RuO ) are widely used as active electrocatalysts accelerating conversion efficiency process, especially in acidic media. Nevertheless, scarcity instability seriously impede large‐scale application practice. In past years, metal‐organic frameworks (MOFs) have proven be an ideal platform designing efficient cost‐effective electrodes due unique physicochemical properties. this review, fundamental catalytic mechanisms evolution reaction (HER) oxygen (OER) media discussed first. Then, design strategies advanced characterizations MOF‐based water‐splitting catalysts summarized. Finally, recent research advances HER OER electrolytes, along with current challenges future opportunities, provided.

Language: Английский

Citations

44
Stability of electrocatalytic OER: from principle to application DOI
Huangjingwei Li,

Yu Lin,

Junyuan Duan

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

A comprehensive summary of the stability electrocatalytic OER will provide insight into electrocatalyst design and device optimization for industrial applications.

Language: Английский

Citations

38
Defect-balanced active and stable Co3O4−x for proton exchange membrane water electrolysis at ampere-level current density DOI
Chengli Rong, Shuhao Wang, Xin Shen

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(12), P. 4196 - 4204

Published: Jan. 1, 2024

Active and stable noble metal-free catalysts for the oxygen evolution reaction (OER) are essential realizing large-scale hydrogen production using proton exchange membrane (PEM) electrolyzers.

Language: Английский

Citations

32
Stabilizing Lattice Oxygen through Mn Doping in NiCo2O4‐δ Spinel Electrocatalysts for Efficient and Durable Acid Oxygen Evolution DOI
Hongyu Zhao, Liu Zhu,

Jie Yin

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(20)

Published: March 18, 2024

Abstract Design the electrocatalysts without noble metal is still a challenge for oxygen evolution reaction (OER) in acid media. Herein, we reported manganese (Mn) doping method to decrease concentration of vacancy (V O ) and form Mn−O structure adjacent octahedral sites spinel NiCo 2 4‐δ (NiMn 1.5 Co 3 ), which highly enhanced activity stability with low overpotential ( η 280 mV at j =10 mA cm −2 long‐term 80 h The isotopic labelling experiment based on differential electrochemical mass spectrometry (DEMS) clearly demonstrated lattice NiMn more stable due strong bond shows synergetic adsorbate mechanism (SAEM) OER. Density functional theory (DFT) calculations reveal increased formation energy (E VO after Mn doping. More importantly, hydrogen bonding between *OOH adsorbed promote *OO from greatly charge density substituted sites.

Language: Английский

Citations

30
Selective Electrocatalytic Conversion of Nitric Oxide to High Value‐Added Chemicals DOI Creative Commons
Dongdong Wang, Xue Feng Lu, Deyan Luan

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(18)

Published: Jan. 25, 2024

The artificial disturbance in the nitrogen cycle has necessitated an urgent need for nitric oxide (NO) removal. Electrochemical technologies NO conversion have gained increasing attention recent years. This comprehensive review presents advancements selective electrocatalytic of to high value-added chemicals, with specific emphasis on catalyst design, electrolyte composition, mass diffusion, and adsorption energies key intermediate species. Furthermore, explores synergistic electrochemical co-electrolysis carbon source molecules, enabling synthesis a range valuable chemicals C─N bonds. It also provides in-depth insights into intricate reaction pathways underlying mechanisms, offering perspectives challenges prospects electrolysis. By advancing comprehension fostering awareness balance, this contributes development efficient sustainable systems from NO.

Language: Английский

Citations

29