Recent progress in porous catalysts for dehydrogenation of ammonia borane

Abstract

Hydrogen emerges as alternative green energy, replacing fossil fuels due to its high gravimetric energy density, pollution free, efficiency, and renewability. Ammonia borane (AB) possessing high hydrogen density (19.6 wt.%)...

Silica Confinement for Stable and Magnetic Co−Cu Alloy Nanoparticles in Nitrogen‐Doped Carbon for Enhanced Hydrogen Evolution

“…As a result, Co 0.8 Cu 0.2 @NC@mSiO 2 exhibited a negligible decrease in activity, with a relative intrinsic activity decline of only 0.8 % after 30 cycles in comparison with that of Co 0.8 Cu 0.2 @NC, underscoring its excellent reusability. As displayed in Figure 5d and Table S3, the stability of Co 0.8 Cu 0.2 @NC@mSiO 2 exceeded that of the majority of reported catalysts [10–22,29–34,42,43,48–75] . A negligible loss was observed for Co 0.8 Cu 0.2 @NC@mSiO 2 , as shown in Table S1.…”

“…As displayed in Figure 5d and Table S3, the stability of Co 0.8 Cu 0.2 @NC@mSiO 2 exceeded that of the majority of reported catalysts. [10][11][12][13][14][15][16][17][18][19][20][21][22][29][30][31][32][33][34]42,43, A negligible loss was observed for evolved through AB hydrolysis performed using Co 0.8 Cu 0.2 @NC, Co 0.8 Cu 0.2 @NC@mSiO 2 -0.2, Co 0.8 Cu 0.2 @NC@mSiO 2 , and Co 0.8 Cu 0.2 @NC@mSiO 2 -0.6 at 298 K. (b) Comparison between the TOFs of Co 0.8 Cu 0.2 @NC@mSiO 2 and previously reported AB-hydrolyzing noble-metal-free catalysts operating at 298 K, originating from Table S2. (c) Relative intrinsic activity of Co 0.8 Cu 0.2 @NC@mSiO 2 subjected to cycling stability tests at 298 K. (d) Stability comparison between Co 0.8 Cu 0.2 @NC@mSiO 2 and previously reported AB-hydrolyzing catalysts (Relative intrinsic activity = the activity of the last cycle/the initial activity).…”

“…[27][28][29][30][31] Among these, CoÀ Cu alloy catalysts have been considered ideal candidates for accelerating hydrogen evolution from AB hydrolysis, owing to the synergistic effects of their CoÀ Cu bimetallic components. [30][31][32] Previous studies have revealed that CoÀ Cu alloy catalysts can be synthesized either by following a step-by-step reduction strategy, or via MOFs pyrolysis. [13,17,33] CoÀ Cu alloy NPs derived from MOFs via pyrolysis have gained tremendous attention owing to their tunable porosity, chemically adjustable composition, high surface area, and organized structure.…”

Hydrogen Generation via Catalytic Ammonia Borane Hydrolysis: A Patent Overview

“…Currently, typical catalysts for AB hydrolysis are derived from NM and non-NM, respectively, as described in the precedent reviews [63], [64], [65], [66], [67], [68], [69], [70], [71], [72], [73], [74], [75], [76], [77], [78], [79], [80], [81], [82], [83]. Although NM catalysts generally exhibit high catalytic activity, their high cost and rarity make them unsuitable for large-scale industrial applications.…”

Silica Confinement for Stable and Magnetic Co−Cu Alloy Nanoparticles in Nitrogen‐Doped Carbon for Enhanced Hydrogen Evolution

“…In recent years, one of the most effective methods for enhancing the catalytic performance of Co‐based catalysts has been the fabrication of bimetallic Co‐based alloy catalysts by introducing other cost‐effective and earth‐abundant transition metals, such as Cu, Ni, and Fe [27–31] . Among these, Co−Cu alloy catalysts have been considered ideal candidates for accelerating hydrogen evolution from AB hydrolysis, owing to the synergistic effects of their Co−Cu bimetallic components [30–32] . Previous studies have revealed that Co−Cu alloy catalysts can be synthesized either by following a step‐by‐step reduction strategy, or via MOFs pyrolysis [13,17,33] .…”