Promoting the hydrogen evolution reaction through oxygen vacancies and phase transformation engineering on layered double hydroxide nanosheets

Liu, Shujie; Zhu, Jie; Sun, Mingzi; Ma, Zhixue; Hu, Kan; Nakajima, Tomohiko; Liu, Xianhu; Schmuki, Patrik; Wang, Lei

doi:10.1039/c9ta12768b

Cited by 178 publications

(119 citation statements)

References 28 publications

Supporting

Mentioning

115

Contrasting

Order By: Relevance

“…The metallic phase could increase the electrical conductivity of cocatalyst and facilitate the charge transfer. In the O 1s spectra (Figure e), the peak at 529.1 eV associated to the typical metal–oxygen (M−O) bond appeared, together with the accompanying peaks on OH − groups and absorbed water . The fitting area of M−O bond expanded from 20.3 to 27.8 % with time of plasma increasing from 5 to 15 min, which was realized to the transformation from metal hydroxide to oxy‐hydroxide.…”

Section: Figurementioning

confidence: 93%

Towards Long‐Term Photostability of Nickel Hydroxide/BiVO₄ Photoanodes for Oxygen Evolution Catalysts via In Situ Catalyst Tuning

Gao

et al. 2020

Angew Chem Int Ed

Self Cite

183

View full text Add to dashboard Cite

Increasing long‐term photostability of BiVO4 photoelectrode is an important issue for solar water splitting. The NiOOH oxygen evolution catalyst (OEC) has fast water oxidation kinetics compared to the FeOOH OEC. However, it generally shows a lower photoresponse and poor stability because of the more substantial interface recombination at the NiOOH/BiVO4 junction. Herein, we utilize a plasma etching approach to reduce both interface/surface recombination at NiOOH/BiVO4 and NiOOH/electrolyte junctions. Further, adding Fe2+ into the borate buffer electrolyte alleviates the active but unstable character of etched‐NiOOH/BiVO4, leading to an outstanding oxygen evolution over 200 h. The improved charge transfer and photostability can be attributed to the active defects and a mixture of NiOOH/NiO/Ni in OEC induced by plasma etching. Metallic Ni acts as the ion source for the in situ generation of the NiFe OEC over long‐term durability.

show abstract

Section: Figurementioning

confidence: 93%

Towards Long‐Term Photostability of Nickel Hydroxide/BiVO₄ Photoanodes for Oxygen Evolution Catalysts via In Situ Catalyst Tuning

Gao

et al. 2020

Angew Chem Int Ed

Self Cite

183

View full text Add to dashboard Cite

show abstract

“…Furthermore, during the synthesis of photocatalysts, nanostructures and morphologies can be controlled to facilitate the generation of oxygen vacancies that efficiently raise the adsorption capacity and consequently make gas molecules (including O 2 , N 2 , H 2 O, and CO 2 ) active [7]. Oxygen vacancies help promote hydrogen evolution reaction performance, due to their beneficial role in charge transfer and water molecule dissociation [8].…”

Section: Introductionmentioning

confidence: 99%

A review of recent advances in water-gas shift catalysis for hydrogen production

2020

View full text Add to dashboard Cite

The water-gas shift reaction (WGSR) is an intermediate reaction in hydrocarbon reforming processes, considered one of the most important reactions for hydrogen production. Here, water and carbon monoxide molecules react to generate hydrogen and carbon dioxide. From the thermodynamics aspect, pressure does not have an impact, whereas low-temperature conditions are suitable for high hydrogen selectivity because of the exothermic nature of the WGSR reaction. The performance of this reaction can be greatly enhanced in the presence of suitable catalysts. The WGSR has been widely studied due do the industrial significance resulting in a good volume of open literature on reactor design and catalyst development. A number of review articles are also available on the fundamental aspects of the reaction, including thermodynamic analysis, reaction condition optimization, catalyst design, and deactivation studies. Over the past few decades, there has been an exceptional development of the catalyst characterization techniques such as near-ambient x-ray photoelectron spectroscopy (NA-XPS) and in situ transmission electron microscopy (in situ TEM), providing atomic level information in presence of gases at elevated temperatures. These tools have been crucial in providing nanoscale structural details and the dynamic changes during reaction conditions, which were not available before. The present review is an attempt to gather the recent progress, particularly in the past decade, on the catalysts for lowtemperature WGSR and their structural properties, leading to new insights that can be used in the future for effective catalyst design. For the ease of reading, the article is divided into subsections based on metals (noble and transition metal), oxide supports, and carbon-based supports. It also aims at providing a brief overview of the reaction conditions by including a table of catalysts with synthesis methods, reaction conditions, and key observations for a quick reference. Based on our study of literature on noble metal catalysts, atomic Pt substituted Mn 3 O 4 shows almost full CO conversion at 260°C itself with zero methane formation. In the case of transition metals group, the inclusion of Cu in catalytic system seems to influence the CO conversion significantly, and in some cases, with CO conversion improvement by 65% at 280°C. Moreover, mesoporous ceria as a catalyst support shows great potential with reports of full CO conversion at a low temperature of 175°C.

show abstract

“…[138][139][140][141] Importantly, it could also act as an emerging environmental friendly technology to modify solid materials without changing their intrinsic properties. [142][143][144][145] Recently, the plasma technology is used to create the vacancies on the surface of electrocatalysts due to its strong etching effect. For instance, MOFs with abundant vacancies were 146 As shown in Figure 9, the engraved CUMSs generated on the surface of Co-MOF-74 by plasma engraving.…”

Section: Plasma Etchingmentioning

confidence: 99%

“…Nowadays, the plasma technology with high electron temperature and low gas temperature has been considered as an efficient and low‐energy consumption method for the preparation or modification of materials without chemical waste 138–141 . Importantly, it could also act as an emerging environmental friendly technology to modify solid materials without changing their intrinsic properties 142–145 . Recently, the plasma technology is used to create the vacancies on the surface of electrocatalysts due to its strong etching effect.…”

Section: Synthetic Strategies Of Vacancies In Mofs and Their Derivativesmentioning

confidence: 99%

Recent advances in vacancy engineering of metal‐organic frameworks and their derivatives for electrocatalysis

Gao

et al. 2021

SusMat

250

115

View full text Add to dashboard Cite

The efficient electrocatalysis plays the key role in the development of electrochemical energy conversion technologies to alleviate energy crisis. Given their multiple active sites and large specific surface areas as electrocatalysts, metalorganic frameworks (MOFs) and their derivatives have attracted considerable interests in recent years. Specially, exploring the roles of the enhanced active sites in MOFs and their derivatives is significant for understanding and developing new effective electrocatalysts. Recently, the vital role of vacancies has been proven to promote electrocatalytic processes (such as H 2 or O 2 evolution reactions, O 2 reduction reactions, and N 2 reduction reactions). In order to in-depth exploring the effect of vacancies in electrocatalysts, the vacancies classification, synthetic strategy, and the recent development of various vacancies in MOFs and their derivatives for electrocatalysis are reviewed. Also, the perspectives on the challenges and opportunities of vacancies in MOFs and their derivatives for electrocatalysis are presented.

show abstract

Promoting the hydrogen evolution reaction through oxygen vacancies and phase transformation engineering on layered double hydroxide nanosheets

Abstract: Effective HER activity on layered double hydroxide nanosheets through a plasma etching strategy.

Cited by 178 publications

References 28 publications

Towards Long‐Term Photostability of Nickel Hydroxide/BiVO₄ Photoanodes for Oxygen Evolution Catalysts via In Situ Catalyst Tuning

Towards Long‐Term Photostability of Nickel Hydroxide/BiVO₄ Photoanodes for Oxygen Evolution Catalysts via In Situ Catalyst Tuning

A review of recent advances in water-gas shift catalysis for hydrogen production

Recent advances in vacancy engineering of metal‐organic frameworks and their derivatives for electrocatalysis

Contact Info

Product

Resources

About

Promoting the hydrogen evolution reaction through oxygen vacancies and phase transformation engineering on layered double hydroxide nanosheets

Abstract: Effective HER activity on layered double hydroxide nanosheets through a plasma etching strategy.

Cited by 178 publications

References 28 publications

Towards Long‐Term Photostability of Nickel Hydroxide/BiVO4 Photoanodes for Oxygen Evolution Catalysts via In Situ Catalyst Tuning

Towards Long‐Term Photostability of Nickel Hydroxide/BiVO4 Photoanodes for Oxygen Evolution Catalysts via In Situ Catalyst Tuning

A review of recent advances in water-gas shift catalysis for hydrogen production

Recent advances in vacancy engineering of metal‐organic frameworks and their derivatives for electrocatalysis

Contact Info

Product

Resources

About

Towards Long‐Term Photostability of Nickel Hydroxide/BiVO₄ Photoanodes for Oxygen Evolution Catalysts via In Situ Catalyst Tuning

Towards Long‐Term Photostability of Nickel Hydroxide/BiVO₄ Photoanodes for Oxygen Evolution Catalysts via In Situ Catalyst Tuning