Anchoring and Upgrading Ultrafine NiPd on Room‐Temperature‐Synthesized Bifunctional NH₂‐N‐rGO toward Low‐Cost and Highly Efficient Catalysts for Selective Formic Acid Dehydrogenation

Abstract

Hydrogen is widely considered to be a sustainable and clean energy alternative to the use of fossil fuels in the future. Its high hydrogen content, nontoxicity, and liquid state at room temperature make formic acid a promising hydrogen carrier. Designing highly efficient and low-cost heterogeneous catalysts is a major challenge for realizing the practical application of formic acid in the fuel-cell-based hydrogen economy. Herein, a simple but effective and rapid strategy is proposed, which demonstrates the synthesis of NiPd bimetallic ultrafine particles (UPs) supported on NH -functionalized and N-doped reduced graphene oxide (NH -N-rGO) at room temperature. The introduction of the NH N group to rGO is the key reason for the formation of the ultrafine and well-dispersed Ni Pd UPs (1.8 nm) with relatively large surface area and more active sites. Surprisingly, the as-prepared low-cost NiPd/NH -N-rGO dsiplays excellent hydrophilicity, 100% H selectivity, 100% conversion, and remarkable catalytic activity (up to 954.3 mol H (mol catalyst) h ) for FA decomposition at room temperature even with no additive, which is much higher than that of the best catalysts so far reported.

Modified Nanocarbons for Catalysis

“…Jiang et al . grafted (3‐aminopropyl)triethoxysilane onto the surface of N ‐doped rGO ( N ‐rGO) before impregnating the obtained material with aqueous solutions of Na 2 PdCl 4 and NiCl 2 (Pd : Ni molar ratio of 0.6 : 0.4) that were subsequently reduced with NaBH 4 leading to the formation of ultrafine particles (1.8 nm) deposited onto material 122 (Figure ) . Material 122 was tested in the dehydrogenation of formic acid at room temperature without the addition of any additives.…”

Biomass Sucrose‐Derived Cobalt@Nitrogen‐Doped Carbon for Catalytic Transfer Hydrogenation of Nitroarenes with Formic Acid

“…Many noble-metal-based catalysts show high efficiency for catalytic decomposition of FA and CTH reactions according to Equation (1). [19][20][21][22][23] Few applications of non-noble metal catalysts in CTH with FA have been Fabrication of non-noble metal-based heterogeneous catalysts by af acile and cost-effective strategy for ecofriendly catalytic transfer hydrogenation (CTH) is of great significance for organic transformations. Ac obalt@nitrogen-doped carbon (Co@NC) catalystw as preparedf rom renewable biomass-derived sucrose, harmless melamine, and earth-abundant Co(AcO) 2 as the precursorm aterials by hydrothermal treatment and carbonization.…”

Determination of optimum Pd:Ni ratio for Pd x Ni 100‐ x / CNT s formic acid electrooxidation catalysts synthesized via sodium borohydride reduction method

“…The electrooxidation of FA is carried out via two pathways, namely, direct (dehydrogenation) and indirect (dehydration). 17,18 Hydrogen and carbon dioxide are obtained via direct pathway, 19,20 while carbon monoxide (CO) and water are generated in the indirect pathway. 21,22 Direct pathway is the more preferred pathway for FA electrooxidation (FAE) due to the toxicity of CO gas.…”