“d‐Electron Complementation” Induced V‐Co Phosphide for Efficient Overall Water Splitting (Adv. Energy Mater. 38/2021)

Zhang, Rui; Wei, Ziyu; Ye, Gaoyang; Chen, Guanjie; Miao, Jiaojiao; Zhou, Xuehua; Zhu, Xiangwei; Cao, Xiaoqun; Sun, Xiangnan

doi:10.1002/aenm.202170148

Cited by 24 publications

(26 citation statements)

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“…In our work, the downshift of ε Co‐d and upshift of ε O‐p /ε B‐p (Figure 1f) synergize to make a balanced binding of the intermediate on the surface of CoBO x /NiSe. [ 35 ]…”

Section: Resultsmentioning

confidence: 99%

Enhancing the d/p‐Band Center Proximity with Amorphous‐Crystalline Interface Coupling for Boosted pH‐Robust Water Electrolysis

Liu

Thangavel

et al. 2023

Advanced Energy Materials

128

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Electrocatalytic splitting of water holds the fossil-free premise for H 2 production, which couples cathodic hydrogen and anodic oxygen evolution reactions (HER/OER). [1] Kinetically driving water electrolysis (WE) requires efficient and stable catalysts to reduce the overpotentials for both HER and OER. [2] During practical WE operations, the electrolyte's pH change is a critical challenge for the activity and stability retention of the electrocatalysts. [3] Therefore, there is an urgent need to develop robust electrocatalysts for wide pH conditions to ensure work efficiency and reduce usage costs. Although Pt-group metals are endowed with active and pH-robust HER/OER properties, the costliness and scarcity greatly limit their sustainable deployments in WE. [4] In this regard, rationalizing non-precious pHrobust catalysts is the top priority of current research for water splitting. Electronic level adjustment is the fundamental technique for the rational design of advanced non-precious catalysts. [5] As known, the d-band (ε d ) and p-band center (ε p ) to Fermi level can well reflect the intermediates' adsorption energies and activation energy barriers during HER/ OER catalysis. [6] Currently, the d-band center level of 3d-metal sites is widely considered to be effective descriptors for HER and OER. [5a] However, the metal sites are not the actual active catalytic centers in some systems, [6c] and the p-band center of non-metal atoms should be revisited together with ε d . Hence, the synergic tuning of d/p-band center will be the design criterion for the innovation of economic, robust, and efficient WE catalysts.Interface engineering is deemed as an effective measure to achieve the d-band center regulation in terms of the interfacial charge transfer between the components. [7] In addition, the heterostructure can exhibit the protection and lattice confinement effect on the surface active atoms, modifying the stability and electronic structure by lattice distortion. [8] Current reports on transition metal heterostructures are mainly crystalline-crystalline complexes, and the interfacial atomic distortion will be hindered by lattice resistance or structural rigidity to some extent. [9] In this context, the establishment of an amorphous-crystalline Rationalizing non-precious pH-robust electrocatalysts is a crucial priority and required for multi-scenario hydrogen production customization. Herein, an amorphous-crystalline CoBO x /NiSe heterostructure is theoretically profiled and constructed for efficient and pH-robust water electrolysis. The crystalline lattice confinement induces a CoCo bond shortening and a B-site delocalization on amorphous CoBO x , resulting in a decreased d-p band center difference (Δε d-p ) toward the balanced intermediates adsorption/desorption. Accordingly, the CoBO x /NiSe heterostructure exhibits efficient and robust hydrogen/oxygen evolution reaction (HER/OER) catalytic activity in different electrolytes. Of particular note, it achieves ultralow overpotentials in both the beyon...

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“…In our work, the downshift of ε Co‐d and upshift of ε O‐p /ε B‐p (Figure 1f) synergize to make a balanced binding of the intermediate on the surface of CoBO x /NiSe. [ 35 ]…”

Section: Resultsmentioning

confidence: 99%

Enhancing the d/p‐Band Center Proximity with Amorphous‐Crystalline Interface Coupling for Boosted pH‐Robust Water Electrolysis

Liu

Thangavel

et al. 2023

Advanced Energy Materials

128

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“…Notably, the peak at 134.28 eV in P 2p spectrum indicates that certain amount of phosphate is formed on the surface of nanostructures due to inevitable surface oxidation [23] . Figure 2(d) shows the high‐resolution V 2p XPS spectrum of V 0.2 Co 0.8 P. The two peaks at 516.82 eV and 524.12 eV can be attributed to the V 2p 3/2 and 2p 1/2 orbits of the V−P bond [24] . The V dopant acts as an electron accepting site to pull partial electrons from nearby Co/P active sites leading to faster charge transfer for HER [25] …”

Section: Resultsmentioning

confidence: 99%

Optimizing Electronic and Geometrical Structure of Vanadium Doped Cobalt Phosphides for Enhanced Electrocatalytic Hydrogen Evolution

et al. 2023

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Despite the expectation on transition-metal phosphides as precious-metal-free electrocatalysts, the reported performance of these materials still necessitates further improvement. Ingenious regulations of both geometric and electronic structure have been proposed as an effective approach to boost their electrocatalytic properties. In this regard, the selfsupported V doped CoP nanowires on nickel foam are prepared to accommodate both optimized electronic structure and desired nanostructure, which enable large surface area, abundant active sites exposure, low charge transfer resistance, as well as favorable H* adsorption. As for the alkaline hydrogen evolution, it only requires a lower potential of 79 mV and 125 mV to drive 10 mA • cm À 2 and 100 mA • cm À 2 current with a Tafel slope of 47.41 mV • dec À 1 , which prevails over commercial Pt/C catalysts. The catalyst also exhibits excellent durability to retain activity unchanged for more than 16 h. Such a simple and convenient strategy by electronic tuning and structure design provides a new avenue toward the exploration of efficient electrocatalysts.

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“…In 10 mA cm −2 , the current density contribution by Pt/Pt was negligible. The overpotential at 10 mA cm −2 was compared with state‐of‐the‐art catalytic (Figure 5f), [ 33,36,42–51 ] as a result, 5#N showed the lowest overpotential. In recent years, Liang et al.…”

Section: Resultsmentioning

confidence: 99%

Manageable Bubble Release Through 3D Printed Microcapillary for Highly Efficient Overall Water Splitting

Zeng

Guo

et al. 2023

Advanced Science

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Porous metal foams (e.g., Ni/Cu/Ti) are applied as catalyst supports extensively for water splitting due to their large specific area and excellent conductivity, however, intrinsic bubble congestion is unavoidable because of the irregular three‐dimensional (3D) networks, resulting in high polarization and degraded electrocatalytic performances. To boost the H2O decomposition kinetics, the immediate bubble removal and water supply sequential in the gas–liquid–solid interface is essential. Inspired by the high efficiency of water/nutrient transport in the capillaries plants, this work designs a graphene‐based capillary array with side holes as catalyst support to manage the bubble release and water supply via a Z‐axis controllable digital light processing (DLP) 3D printing technology. Like planting rice, a low‐cost, high‐active CoNi carbonate hydroxide (CoNiCH) is planted on support. A homemade cell can reach 10 mA cm−2 in 1.51 V, and be kept at 30 mA cm−2 for 60 h without noticeable degradation, surpassing most of the known cells. This research provides a promising avenue to design and prepare advanced catalysts in various fields, including energy applications, pollutant treatment, and chemical synthesis.

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“d‐Electron Complementation” Induced V‐Co Phosphide for Efficient Overall Water Splitting (Adv. Energy Mater. 38/2021)

Cited by 24 publications

References 0 publications

Enhancing the d/p‐Band Center Proximity with Amorphous‐Crystalline Interface Coupling for Boosted pH‐Robust Water Electrolysis

Enhancing the d/p‐Band Center Proximity with Amorphous‐Crystalline Interface Coupling for Boosted pH‐Robust Water Electrolysis

Optimizing Electronic and Geometrical Structure of Vanadium Doped Cobalt Phosphides for Enhanced Electrocatalytic Hydrogen Evolution

Manageable Bubble Release Through 3D Printed Microcapillary for Highly Efficient Overall Water Splitting

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