## 3 Results and Discussion  
### Catalyst Activity Performance  
The reaction activity and apparent activation energies of 1,2-DCE over the (Ru, Rh, Pt, Pd, Ir, and Au)/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) materials were tested and calculated, and are exhibited in Figure 1a. As shown, the catalytic performance of the prepared catalysts can destruct 1,2-DCE below 400 \({}^{\circ}\)C. By comparing the prepared materials at T\({}_{90}\) (the reaction temperature of 90% of 1,2-DCE conversion), the conversion efficiencies of all prepared catalysts can be ordered as follows: of Ru/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (337 \({}^{\circ}\)C) \(>\) Rh/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (349 \({}^{\circ}\)C) \(>\) Pt/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (361 \({}^{\circ}\)C) \(=\) Pd/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (361 \({}^{\circ}\)C) \(>\) Au/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (373 \({}^{\circ}\)C) \(>\) Ir/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (380 \({}^{\circ}\)C). Overall, the Ru-based catalyst showed the best 1,2-DCE degradation performance among the noble metal catalysts, which might be associated with its excellent declhorination effect from Deacon reaction process [9], and which has the advantage of decreasing the toxic impact of chlorine species compared to other noble metal materials. On the other hand, the simple synthesis method of NaBH\({}_{4}\) and hydrazine hydrate reduction could create superior NM-supported catalysts compared with most of the other samples, as shown in Table S1. What is more, the catalytic ability of \(\gamma\)-Al\({}_{2}\)O\({}_{3}\) was tested and illustrated in Figure S2, where a 90% 1,2-DCE conversion occurred at 419 \({}^{\circ}\)C, the efficiency is far lower than that of noble metal-supported catalysts, indicating that the enhancement of the oxidation ability is mainly ascribed to the participation of noble metals. The CO and CO\({}_{2}\) yield from effluent streams of the NM/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) catalysts was tested and is displayed in Figure 1c. As shown, the CO\({}_{2}\) yield of NM/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) catalysts enhances with the increase in reaction temperature. Along with the 1,2-DCE complete oxidation condition, the CO\({}_{2}\) yield efficiency of the prepared catalysts can be ordered as follows: Ru/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (99.15%) \(>\) Rh/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (96.79%) \(>\) Pt/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (94.31%) \(>\) Pd/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (92.20%) \(>\) Ir/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (54.52%) \(>\) Au/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (40.76%). As shown, the CO yield increases along with the climbing temperature and decreases rapidly when 1,2-DCE conversion is more than 50% for Ru/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\), Rh/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\), Pt/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\), and Pd/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) catalysts. Moreover, CO concentration increases with the increase in temperature over Ir/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) and Au/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\). In summary, the CO yield of those catalysts at the temperature of 1,2-DCE complete oxidation can be ordered as follows: Ir/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (33.14%) \(>\) Au/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (28.33%) \(>\) Pd/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (3.81%) \(>\) Pt/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (1.00%) \(>\) Rh/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (0.07%) \(>\) Ru/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) (0%). CO\({}_{\rm\chi}\) generation is usually represented as an indicator of mineralization of VOC oxidation; in this aspect, Ru/\(\gamma\)-Al\({}_{2}\)O\({}_{3}\) displayed the highest mineralization efficiency compared with other catalysts. Figure 1b and Table 1 show the \(E_{\rm a}\) tendency of the prepared catalysts, which was calculated to further evaluate the catalytic behavior of the prepared materials.