Interfacial electronic interaction of atomically dispersed IrClx on ultrathin Co(OH)2/CNTs for efficient electrocatalytic water oxidation

Huang, Yiwen; Wei, Guijuan; He, Jia; An, Cuihua; Hu, Min; Miao, Shu; Zhu, Junfa; Yao, Shuang; Xi, Wei; Si, Rui; Zhang, Zhiming; An, Changhua

doi:10.1016/j.apcatb.2020.119398

Cited by 22 publications

(20 citation statements)

References 40 publications

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“…From the XANES and EXAFS spectra, strong interactions were demonstrated between IrCl x and Co(OH) 2 via Ir–Cl–Co and Ir–O–Co without obvious Ir–Ir or Ir–Co scattering paths, which can boost electronic conductivity (Figure d). As a result, the hybrid electrocatalysts inhibited easier ability of deprotonation on the IrCl x -Co(OH) 2 site and superior electrocatalytic activity toward OER in alkaline solution …”

Section: Support Effects In Electrocatalysismentioning

confidence: 99%

“…As a result, the hybrid electrocatalysts inhibited easier ability of deprotonation on the IrCl x -Co(OH) 2 site and superior electrocatalytic activity toward OER in alkaline solution. 34 As acknowledged above, the support sometimes can involve electrochemical reactions directly. Thus, it is necessary to precisely identify the structure of the support or the central metal atom coordination structure.…”

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confidence: 99%

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Support Effects in Electrocatalysis and Their Synchrotron Radiation-Based Characterizations

Sheng

Cao

Liu

et al. 2021

J. Phys. Chem. Lett.

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Electrocatalysis is recognized as a significant process for energy conversion. In fact, numerous factors, including the variable electronic structure of electrocatalysts, rich intermediates, and mutable active phases, have important but complex influences on the catalytic process. In addition, the support of electrocatalysts is considered as one of key factors that correlate to the final catalytic performance. In this Perspective, some recent advances regarding the support effects in electrocatalysis are briefly summarized. Synchrotron radiation-based characterizations are introduced to reveal the support-induced modulation in electrocatalysts. Recent in situ/operando studies are emphasized for better understanding of the real interaction between catalysts and support, together with visualizing the dynamic catalytic process. Some perspectives are proposed that may accelerate more attention being given to the support’s optimization for future practical applications.

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Section: Support Effects In Electrocatalysismentioning

confidence: 99%

mentioning

confidence: 99%

Support Effects in Electrocatalysis and Their Synchrotron Radiation-Based Characterizations

Sheng

Cao

Liu

et al. 2021

J. Phys. Chem. Lett.

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“…[5][6][7]. Relative to the HER, the OER is a four-electron proton coupled transfer process, and possesses sluggish kinetics, severely limiting the efficiency of overall water splitting [8][9][10]. To date, the state-of-the-art OER catalysts mainly focus on precious metal catalysts (such as RuO 2 and IrO 2 ), but their scarcity and high cost limit their implementation in practical commercial applications [11,12].…”

Section: Introductionmentioning

confidence: 99%

Borate Anion Dopant Inducing Oxygen Vacancies over Co3O4 Nanocages for Enhanced Oxygen Evolution

Liu

et al. 2021

Catalysts

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The rational design of cost effective and highly efficient oxygen evolution reaction (OER) catalysts plays an extremely important role in promoting the commercial applications of electrochemical water splitting. Herein we reported a sacrificial template strategy for the preparation of borate anion doped Co3O4@ZIF-67 nanocages assembled with nanosheets (B-Co3O4@ZIF-67) by hydrothermal boronation of zeolitic imidazolate framework-67 (ZIF-67). During the preparation process, two different kinds of borate anion sources were found to regulate the morphological structures by tuning the etching rate between ZIF precursors and the borate anion. Moreover, borate anion doping was also found to induce oxygen vacancy defects, which is beneficial for modulating the electronic structure and accelerating electron transport. Meanwhile, the resultant B-Co3O4@ZIF-67 nanocages possess a large specific surface area, which is beneficial for the mass transfer of the electrolyte and exposing more catalytic active sites. Benefiting from the advantages above, the resultant B-Co3O4@ZIF-67 nanocages exhibit impressive OER performance with a small overpotential of 334 mV, a current density of 10 mA cm−2, a small Tafel slope of 73.88 mV dec−1, as well as long-term durability in an alkaline electrolyte.

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“…Co-based compounds are considered to have ideal corrosion resistance in alkaline solutions, but the activity of single individual Co compounds is insufficient. [32][33][34] For further improving the catalytic performance of MoS 2 and accelerate electron conduction, supporting MoS 2 on graphene or carbon nanotubes has been widely implemented. [35][36][37] In these materials, MWCNTs have large specific surface are as the support, which can make the catalyst obtain higher active site.…”

Section: Introductionmentioning

confidence: 99%

Co−Mo−S Nanoflowers Wrapped Oxidized Multi‐Walled Carbon Nanotubes as Efficient Electrocatalysts for Oxygen Evolution Reaction

Zhou

et al. 2021

ChemCatChem

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Developing highly active and stable earth-abundant electrocatalysts for water splitting is of prime importance for renewable energy conversion systems. Herein, we develop a facile hydrothermal process to prepare nanoflowers by compounding CoÀ MoÀ S and oxidized multi-walled carbon nanotubes (denoted as Co 1.5 Mo 1.0 S/o-MWNTs) as efficient oxygen evolution reaction (OER) catalysts. Oxidized MWNTs could enhance the hydrophilicity and electrical conductivity of the catalyst conductivity. Co and Mo charge transfer can be accelerated after the chemical hybridization of Co, Mo and highly conductive o-MWNTs. Co is easily oxidized into cobalt oxyhydroxide, which acts as the active site for OER. The electrocatalyst exhibits highly efficient electrocatalytic performances, achieving low overpotential of 311 mV for the OER at current density of 10 mA cm À 2 and low Tafel slope of 70 mV dec À 1 in alkaline media. The catalyst maintains good stability even after 10 hours of chronoamperometry test at 1.60 V in alkaline solution. This work provides a new direction for boosting the electrocatalytic activity through coupling bimetallic sulfides and constructing with conductive substrate.

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Interfacial electronic interaction of atomically dispersed IrClx on ultrathin Co(OH)2/CNTs for efficient electrocatalytic water oxidation

Cited by 22 publications

References 40 publications

Support Effects in Electrocatalysis and Their Synchrotron Radiation-Based Characterizations

Support Effects in Electrocatalysis and Their Synchrotron Radiation-Based Characterizations

Borate Anion Dopant Inducing Oxygen Vacancies over Co3O4 Nanocages for Enhanced Oxygen Evolution

Co−Mo−S Nanoflowers Wrapped Oxidized Multi‐Walled Carbon Nanotubes as Efficient Electrocatalysts for Oxygen Evolution Reaction

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