Electroreduction of nitrate anions on cubic and polyoriented platinum nanoparticles modified by copper adatoms

Cu Modified Pt Nanoflowers with Preferential (100) Surfaces for Selective Electroreduction of Nitrate

“…shown in Figure 1H, confirms that the exposed active surface of the Pt NFs is predominantly Pt(100) which can be ascribed to the (100) step sites at the peak of 0.28 V and (100) terraces with a wide shoulder located at 0.35 V [26]. According to the aforementioned characterizations and compared with other three-dimensional platinum nanostructures reported recently [13,23], the as-prepared Pt NFs / CC is more suitable for investigating the nitrate reduction since (i) the flower-like structure with numerous nanosheets would give rise to the surface areas and facilitate estimating the current density of the products obtained from nitrate reduction; (ii) the boarder exposed Pt(100) steps and terraces should provide enough sites for decorating a "promoter" metal for the conversion of nitrate to nitrite and subsequently contribute to selective reducing nitrite to N2 in alkaline solutions. Cu / Pt NFs / CC was prepared by carrying out the potentiostatic deposition at 0.65 V after transferring the Pt NFs / CC electrode into the Cu 2+ containing electrolyte.…”

“…Bimetallic electrocatalysts based on Pt(100) have long been investigated for nitrate reduction in acid and neutral solutions, showing NH 3 and N 2 O as the major final products [11][12][13][14][15][16]. However, for selecting N 2 as the main product, the study of alkaline solutions is essential for nitrate reduction on such a catalyst which would make use of Pt(100).…”

Electrocatalytic reduction of nitrate – a step towards a sustainable nitrogen cycle

“…Most of the understanding of the electrocatalytic nitrate reduction mechanism is based on Pt catalysts. 43,[45][46][47][48] Here, the representative nitrate reduction mechanism on Pt electrodes will be described. The multi-step reduction process of NO 3…”

“…Additionally, hydroxylammonium (NH 3 OH + ) was also observed among the reaction products in a number of studies. 46,[55][56][57] NO 3…”

Restoring the Nitrogen Cycle by Electrochemical Reduction of Nitrate: Progress and Prospects

“…Cu adatoms can be deposited onto the substrate through direct electrodepositions. [105][106][107][108] Chen et al modified Pt (100) with Cu adatoms, with the selective conversion from NO 3 − to N 2 achieved on Cu/Pt(100). [107] This selective conversion is realized in different potential windows.…”