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Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

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Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
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迈向高效水分的一步:一个高性能CuCo (OH) 电催化剂.

Sahana Raju1, Darshan M1, Bhanupriya H1

  • 1Department of Chemistry, School of Applied Sciences, REVA University, Bangalore-560064, India. shivanna87@gmail.com.

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一种新的CuCo (OH) 2/CNT/MoS (MoS) 2电催化剂在氧演化 (OER) 和演化 (HER) 反应方面表现出色. 这种双功能材料在各种条件下提供了高效率和耐用性,用于在各种条件下进行整体水分.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 电化学 电化学 电化学
  • 催化剂是一种催化剂.

背景情况:

  • 开发高效的电催化剂对于可持续能源技术至关重要,比如水分.
  • 现有的催化剂往往由于活性低,稳定性差或成本高而受到损害.
  • 可以催化氧进化和进化反应的双功能电催化剂是非常可取的.

研究的目的:

  • 为了合成和描述一个新的CuCo(OH)2/CNT/MoS2复合电催化剂.
  • 评估复合物的电催化性能,以测量氧进化反应 (OER) 和进化反应 (HER).
  • 为了研究复合材料的耐用性和效率,用于整体水分裂 (OWS).

主要方法:

  • 快速联合沉合成的CuCo(OH)2/CNT/MoS2的复合物.
  • 电化学特征包括超电位,Tafel斜率和循环电压测量.
  • 在性和酸性介质中测试耐用性.
  • 计算营业额频率 (TOF) 和质量活动.

主要成果:

  • 复合CuCo(OH) 2/CNT/MoS2呈现出OER (65mV) 和HER (211mV) 在η10的低超电位.
  • 观察到异常耐用性,活性维持超过40小时 (性) 和25小时 (酸性).
  • 总体而言,水分裂只需要170mV的超电位,在稳定性测试后显著降低.

结论:

  • 在CuCo(OH) 2,CNT和MoS2之间的协同作用提高了电导率和表面积,提高了电化学性能.
  • 合成的复合材料是一种高效和耐用的双功能电催化剂,用于整体的水分解.
  • 这种材料对推进气生产技术具有重大前景.