A New Platinum‐Like Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH: Single‐Crystal Metallic Interweaved V₈C₇ Networks

Abstract

COMMUNICATION 1800575 (1 of 7)

Polyoxometalate‐Derived Hexagonal Molybdenum Nitrides (MXenes) Supported by Boron, Nitrogen Codoped Carbon Nanotubes for Efficient Electrochemical Hydrogen Evolution from Seawater

“…Figure b represents that η@10 mA cm −2 of h‐MoN@BNCNT in neutral solution is 143 mV and the Tafel slope is 135 mV per decade, while η@10 mA cm −2 of h‐MoN@BNCNT in alkaline solution exhibits 118 mV with Tafel slope of 59 mV per decade, as shown in Figure c. To sum up, the trend of η@10 mA cm −2 and Tafel slope tend to first rise and then descend with increasing pH value, which was also reported by other groups . It is obvious that η@10 mA cm −2 and Tafel slope of h‐MoN@BNCNT will be the closest to those of Pt/C when pH is 7.…”

Transition‐Metal Oxides/Carbides@Carbon Nanotube Composites as Multifunctional Electrocatalysts for Challenging Oxidations and Reductions

“…The Mn 3s peak (Figure c) shows two multiplet split components, which are caused by 3s–3d electronic coupling (peak separation: 5.9 eV); this indicates the presence of Mn II in MnO (expected peak separation: 6.0 eV) . The deconvoluted V 2p spectrum (Figure d) indicates the presence of V−C (carbide) bonds, which is in line with the formation of V 8 C 7 , as well as peaks assigned to V 2p 3/2 and V 2p 1/2 . Analysis of the deconvoluted C 1s spectrum (Figure e) indicates the presence of C−C, C−V, C−O−C, and O−C=O, respectively.…”

Phosphate Doped Ultrathin FeP Nanosheets as Efficient Electrocatalysts for the Hydrogen Evolution Reaction in Acid Media

“…[6][7][8] The scarcity and high cost of Pt, however, greatly restrict the use of Pt-based electrocatalysts in mass industrial production. To solve this issue, a variety of transition-metal-based HER catalysts have been developed, [9,10] including metal carbides, [11][12][13] selenides, [14,15] phosphides [16,17] and chalcogenides. [18,19] However, there are still challenges in achieving the low-cost electrocatalysts with high catalytic activity and stability matching those of Pt-based electrocatalysts.…”