Prepare working electrode

References

1. NonAqueous NITRR

2. Aqueous NITRR

2.1. References

Low-Coordination Rhodium Catalysts for an Efficient Electrochemical Nitrate Reduction to Ammonia ACS Catal. 2023, 13, 2, 1513–1521
Structure Sensitivity of Pd Facets for Enhanced Electrochemical Nitrate Reduction to Ammonia ACS Catal. 2021, 11, 12, 7568–7577

2.2. For Electrochemical Catalyst

2.2.1. Preparing working electrode

Material loaded on carbon cloth (1.0×1.0 cm2) were used as the working electrode. For the preparation of catalysts loaded on carbon cloth, the carbon cloth was first ultrasonically cleaned for several times in alternative baths of deionized water and ethanol, and then dried at room temperature. Typically, the homogeneous electrocatalyst ink was prepared by dispersing 5 mg catalysts and 50 μL of Nafion solution (5 wt%) in 400 μL absolute ethyl alcohol and 600 μL Millipore water. Then, the catalyst ink (100 uL 5 mg mL−1) was dropped on 1 cm2 of carbon cloth.

The Cu mesh was cut into rectangle with an area of 3 cm × 1 cm, and then ultrasonicated in acetone, water, 3 M HCl aqueous solution, respectively. Finally, they were rinsed by deionized water and dried at ambient conditions for further us

Catalyst inks were prepared by mixing/dispersing the catalyst (1.5 mg mL–1) and a Nafion ionomer solution (5 wt %, Sigma-Aldrich) (20 μL mL–1) in the mixture of isopropyl alcohol and ultrapure water. After ultrasonication for 20 min, 10 μL of uniformly dispersed ink was deposited onto a glassy carbon electrode (GCE). The Pd loading densities of all catalysts on GCEs were 25 μgPd cm–2, and the thin films on the surfaces of GCEs were dried under ambient conditions in air.^{[ACS Catal. 2021, 11, 12, 7568–7577]}