Carbon nanotube-supported Cu₃N nanocrystals as a highly active catalyst for oxygen reduction reaction

Abstract

We report a heterostructured Cu3N@CNT electrocatalyst for application in alkaline fuel cells. The size of well-dispersed Cu3N nanoparticles can be precisely controlled by ALD. Superior catalytic oxygen reduction reaction performance was achieved with a mixed two- and four-electron process.

Copper‐Nitride Nanowires Array: An Efficient Dual‐Functional Catalyst Electrode for Sensitive and Selective Non‐Enzymatic Glucose and Hydrogen Peroxide Sensing

“…The strong peaks at 933.14 and 953.10 eV can be assigned to the binding energies of the 2p 3/2 and 2p 1/2 electrons of Cu I , respectively. The strong peak near 398.20 eV in the N 1s region is consistent with the N environment in Cu 3 N …”

“…The X-ray photoelectron spectroscopy (XPS) survey spectrum ( Figure S3) reveals the presence of Cu and Ne lements. The XPS spectra in the Cu 2p and N1 sr egions are shown in Figure 1f,g,r espectively.T he strongp eaks at 933.14 and 953.10 eV can be assigned to the binding energies of the 2p 3/2 and 2p 1/2 electrons of Cu I ,r espectively.T he strong peak near 398.20eVi nt he N1 s region is consistentwith the Nenvironment in Cu 3 N. [25] The electrocatalytic properties of the 3D Cu 3 NN A/CF electrode for Glu oxidation were studied with platinum wire as ac ounter electrode and Hg/HgO as the reference electrode. Figure 2a shows the cyclic voltammograms (CVs) of Cu 3 NN A/ CF,C u(OH) 2 NA/CF and bare CF in 0.1 m NaOH with the absence (curve 1, 3, 5) and presence (curve 2, 4, 6) of 1mm Glu at as can rate of 30 mV s À1 within the potential range of À0.1-0.8 V. As observed, bare CF andC u(OH) 2 NA/CF give no obvious redox peaks response in the absence and the presence of 1mm Glu.…”

Efficient synthesis of nitrogen-doped carbon with flower-like tungsten nitride nanosheets for improving the oxygen reduction reactions

“…The "pseudo four-electron pathway" has been reported to involve a catalytic regenerative process, wherein hydrogen peroxide is chemically converted to hydroxide (OH À ) and molecular oxygen (O 2 ) via disproportionation. 49 From the above results, we can speculate the mechanism by which the catalytic activity of the WN FNs/N-C hybrid was improved by a mixed twoand four-electron transfer ORR process.…”

Interfacial engineering by creating Cu-based ternary heterostructures on C3N4 tubes towards enhanced photocatalytic oxidative coupling of benzylamines

“…It turned out that samples synthesized from different Cu (Ac) 2 /melamine molar ratios have similar patterns ( 200crystal planes of Cu 3 N (PDF# 47-1088). [24][25][26][27][28][29] Further, a weak broad peak at about 27 is visible, which is attributable to the Xray reections from the (002) crystal planes of C 3 N 4 (corresponding to interlayer stacking). 30,31 Moreover, all these characteristic peaks are sharp and strong due to the good crystallinity of Cu, Cu 2 O, and Cu 3 N, which is in line with the TEM result.…”