Photocatalytically generated H2O2-driven nickel dissolution has been studied as a novel, secondary waste minimal decontamination process for nuclear process steels. Nickel corrosion experiments in dilute H2SO4 show that at deliberately added [H2O2] ≤ 1 mM, nickel dissolution occurs via formation and dissolution of NiOH groups; at [H2O2] ≥ 10 mM (pseudo-)passivation by NiO prevents this. Furthermore, Nickel also dissolves slowly in mild acid, dissolution that is significantly accelerated in the presence of photogenerated peroxide – suggesting that photocatalytically generated H2O2 could be used to selectively increase dissolution of Ni, and potentially steel, surfaces that normally dissolve only slowly in mild acid.

中文翻译：

---

宏观镍表面的光催化溶解

光催化产生的 H2O2 驱动的镍溶解已被研究作为一种用于核工艺钢的新型二次废物最小净化工艺。在稀 H2SO4 中的镍腐蚀实验表明，在有意添加的 [H2O2] ≤ 1 mM 时，通过 NiOH 基团的形成和溶解发生镍溶解；在 [H2O2] ≥ 10 mM (pseudo-) 钝化时，NiO 可防止这种情况发生。此外，镍在弱酸中也缓慢溶解，在光生过氧化物的存在下溶解会显着加速——这表明光催化产生的 H2O2 可用于选择性地增加 Ni 的溶解，可能还有钢，通常只能在弱酸中缓慢溶解的表面.