Phase stability and oxygen doping in the Cu–N–O system

Synthesis of Cu3N from CuO and NaNH2

“…However, this absorption is different from that in other reports (∼1.4 eV) [1,18]. This discrepancy could be related to the surface and/or oxygen incorporation in the product [2].…”

“…Nonetheless, four kinds of stoichiometric Cu 3 N show slightly different lattice parameters [11], which might be related to inclusion of hydrogen [3]. Incorporation of oxygen does not significantly change the lattice parameter [2]. Thus, we cannot deny the possibility of hydrogen and oxygen incorporation.…”

“…It is a semiconductive nitride with a band gap of ∼1.4 eV, which is suitable for solar energy conversion [1]. Incorporation of hydrogen and oxygen and its nonstoichiometry change its transport and optical properties [2][3][4][5]. Moreover, some recent studies focus on its catalytic properties, such as Huisgen cycloaddition [6] and electrochemical oxygen reduction [7].…”

The influence of oxygen and nitrogen contamination on the densification behavior of cryomilled copper powders during spark plasma sintering

“…The sharp peaks at *720°C in the ion current curves and the narrow temperature range (*670-800°C) for weight loss in the TG curve (with a maximum weight loss rate at *720°C) indicate thermal decomposition of some chemical compound(s). Cu 3 N, if it is present in the powders, decomposes at *300°C [35,36]. In addition, Cu 2 O is stable and will not decompose to Cu up to a temperature of 1000°C [33,34].…”

Gas‐Pulsed CVD for Film Growth in the CuNiN System

“…The large vacancy in the 1 =2, 1 =2, 1 =2 position might be filled up with a metal atom, and an interstitial solid solution is formed. It has been previously shown that small amounts of metals e.g., Ag, Pd, Li, and Ti, [10][11][12][13][14] as well as non-metals such as H and O, [15][16][17][18][19][20][21] can be introduced into the Cu 3 N structure.…”