Phosphine vapor-assisted construction of heterostructured Ni₂P/NiTe₂ catalysts for efficient hydrogen evolution

Abstract

A PH3 vapor-assisted phase and structure engineering strategy to convert non-active NiTe into super-active Ni2P/NiTe2 catalysts for hydrogen evolution reaction.

Metal–Sulfur Linkages Achieved by Organic Tethering of Ruthenium Nanocrystals for Enhanced Electrochemical Nitrogen Reduction

“…Electrochemical nitrogen reduction reaction (NRR) powered by renewable energy sources is potentially a sustainable approach for nitrogen (N 2 ) fixation. However, the inert nature of N 2 and intensive competition from hydrogen evolution reaction (HER) impede its performance with sluggish kinetics and low selectivity [3–7] . Ru‐based transition metal catalysts are active catalysts for NRR at ambient conditions that can activate and polarize the inert N 2 molecule by accepting and donating electronic density [8–11] .…”

“…However, the inert nature of N 2 and intensive competition from hydrogen evolution reaction (HER) impede its performance with sluggish kinetics and low selectivity. [3][4][5][6][7] Ru-based transition metal catalysts are active catalysts for NRR at ambient conditions that can activate and polarize the inert N 2 molecule by accepting and donating electronic density. [8][9][10][11] However, they are limited by the low selectivity and faradaic efficiency (FE) towards NH 3 that could be attributed to the high affinity of H-adsorption on the Ru surface.…”

Hierarchical Ultrathin Mo/MoS2(1−x−y)Px Nanosheets Assembled on P, N Co‐Doped Carbon Nanotubes for Hydrogen Evolution in Both Acidic and Alkaline Electrolytes

“…The sluggish HER kinetics of the H-MoS 2 @NC in alkaline media results from its inability to effectively adsorb hydroxyl species on its surface, leading to being inefficient to discharge H 2 O, which is further proved by DFT calculation of the H 2 O dissociation energy barriers. [8,53,54] As shown in Figure S17, Supporting Information, the water dissociation energy barrier of Mo 25 S 50 is as high as 3.80 eV. After the substitution of S by P, the H 2 O dissociation barriers of Mo 25 S 49 P, and Mo 25 S 48 P 2 are reduced to 1.93 and 1.75 eV, respectively, indicating that a higher concentration of P in Mo 25 S 50 can decrease the H 2 O dissociation barriers, thus promoting H 2 O dissociation and accelerating the rate of H* formation.…”

“…[4][5][6] Presently, considerable progress has been made in exploring non-noble metal electrocatalysts for water splitting, including transition metal oxides, chalcogenides, and phosphides, etc. [3,7,8] Among these developed catalytic materials, molybdenum (Mo)-based materials have attracted considerable interest for energy conversion. [9][10][11] For example, molybdenum phosphide (MoP) possesses high electronic conductivity (>5000 S cm −1 ) and electrochemical activity, which is beneficial for electrocatalytic applications such as hydrogenation and hydrodesulfurization.…”

Design and operando/in situ characterization of precious‐metal‐free electrocatalysts for alkaline water splitting

“…Our group recently reported heterostructured Ni 2 P/NiTe 2 catalysts prepared via phosphine vapor-assisted approach for efficient HER, delivering 10 mA cm −2 at an overpotential of merely 62 mV. 70 The outstanding HER performance is originated from the abundant active sites and lower kinetic barrier for water dissociation on the interface of Ni 2 P/NiTe 2 electrocatalyst. Liang et al 19 reported the integration of NiFe oxyhydroxide with NiFe alloy nanowires through a magnetic-field-assisted chemical deposition approach resulted in a significantly improved OER performance.…”