Polyoxometalate-derived bimetallic catalysts for the nitrogen reduction reaction

Abstract

Facile design of low-cost and efficient electrocatalysts is one of the urgent problems to be solved for electrocatalytic nitrogen reduction reaction (NRR) under mild environment. Among them, polyoxometalates (POMs) are...

Hexanuclear nickel-added silicotungstates as high-efficiency electrocatalysts for nitrate reduction to ammonia

“…The Haber-Bosch process has been recognized as a significant strategy for N 2 fixation since the first appearance of nitrogen reduction reaction (NRR) catalysts in 1807 [14][15][16]. However, the Haber-Bosch N 2 fixation process must be conducted at high pressures and temperatures (approximately 400 °C, 15-25 MPa), and this process consumes large amounts of energy and emits considerable amount of greenhouse gases [17], which frequently results in expensive equipment needs and significant environmental problems, so this method is not energy efficient and environmentally friendly [18,19]. Therefore, finding green, highefficiency, and environmentally friendly methods for reducing nitrogen to NH 3 under mild conditions is urgently necessary because of the current energy problems and the desire for carbon neutrality [20].…”

Breaking scaling relations in nitrogen reduction with asymmetrical heterobimetallic FeCo sites to boost ammonia synthesis

“…It might be easy to regulate the adsorption energy of a single intermediate in reactions with one-intermediate, but it is impossible to tune the adsorption energy of all intermediates simultaneously in multi-intermediate reactions, since the well-known adsorbate scaling relations forbid the binding strength of a certain intermediate from being optimized freely. [27][28][29][30] As a result, the ultrahigh limiting potential of the rate-determining step (RDS) remains a great challenge. 31 Taking inspiration from nature, where nitrogen is fixed on the nitrogenase enzyme complex containing heteronuclear FeMo active centers, [32][33][34] developing heterobimetallic electrocatalysts featuring synergetic interatomic interactions and more flexible active sites would be a promising strategy to address this issue.…”

Two new manganese-based phosphomolybdate compounds as electrochemical sensors for the highly sensitive trace determination of heavy metal Cr(vi) ions

“…{P 4 Mo 6 }) has distinct redox properties. 30–32 All Mo atoms in {P 4 Mo 6 } have high-reduction states, showing obvious redox properties in the electrochemical process. 28,33–36 Recently, {P 4 Mo 6 }-based compounds have been widely used in the field of electrochemistry with good results, such as electrocatalytic reduction of Cr( vi ), 6,37,38 electrocatalytic hydrogen, 39,40 oxygen production, 41 battery, 42 and proton conduction.…”